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| HA17431H Series Shunt Regulator ADE-204-070 (Z) Preliminary Rev.0 Sep. 2001 Description The HA17431H series is a family of voltage referenced shunt regulators. The main application of these products is in voltage regulators that provide a variable output voltage. The HA17431H series products are provided in a wide range of packages; TO-92 insertion mounting packages and MPAK-5 (5 pin), MPAK (3 pin), UPAK surface mounting packages are available. The on-chip high-precision reference voltage source can provide 1% accuracy, which have a VKA max of 36 volts. Features * The reference voltage provide 2.500 V 1% at Ta = 25C * The reference voltage has a low temperature coefficient * The MPAK-5 (5 pin), MPAK (3 pin) and UPAK miniature packages are optimal for use on high mounting density circuit boards Block Diagram K REF 2.500 V + - A HA17431H Series Application Circuit Example Switching power supply secondary-side error amplification circuit Vout R R1 K + - REF A HA17431H Series R2 GND Ordering Information Item Industrial use HA17431HLP HA17431HP HA17431HUP HA17432HUP HA17431HLTP HA17432HLTP MPAK Package MPAK-5 TO-92 UPAK Temp. Range -20 to +85C Pin Arrangement MPAK-5 NC NC UPAK (HA17431HUP) A UPAK (HA17432HUP) A TO-92 Face REF A K REF A K K A REF MPAK (HA17431HLTP) A MPAK (HA17432HLTP) A REF A K REF K K REF Rev.0, Sep. 2001, page 2 of 15 HA17431H Series Absolute Maximum Ratings (Ta = 25C) Ratings Item Cathode voltage Continuous cathode current Reference input current Power dissipation Operating temperature range Storage temperature Symbol VKA IK Iref PT Topr Tstg HA17431HLP 36 -50 to +50 -0.05 to +6 150 *2 -20 to +85 -55 to +150 HA17431HP 36 -50 to +50 -0.05 to +6 500 *3 -20 to +85 -55 to +150 HA17431HUP/ HA17432HUP 36 -50 to +50 -0.05 to +6 800 *4 -20 to +85 -55 to +150 HA17431HLTP/ HA17432HLTP 36 -50 to +50 -0.05 to +6 150 *2 -20 to +85 -55 to +150 Unit V mA mA MW C C Notes 1 Notes: 1. 2. 3. 4. Voltages are referenced to anode. Ta 25C. If Ta > 25C, derate by 1.2 mW/C. Ta 25C. If Ta > 25C, derate by 4.0 mW/C. 15 mm x 25 mm x t0.7mm alumina ceramic board,Ta 25C. If Ta > 25C, derate by 6.4 mW/C. Rev.0, Sep. 2001, page 3 of 15 HA17431H Series Electrical Characteristics (Ta = 25C, IK = 10 mA) Item Reference voltage Reference voltage temperature deviation Reference voltage temperature coefficient Reference voltage regulation Reference input current Reference current temperature deviation Minimum cathode current Off state cathode current Dynamic impedance Symbol Vref Vref(dev) Min 2.475 -- Typ 2.500 10 Max 2.525 -- Unit V mV Test Conditions VKA = Vref VKA = Vref, Ta = -20C to +85C VKA = Vref, 0C to 50C gradient VKA = Vref to 36 V R1 = 10 k, R2 = R1 = 10 k, R2 = , Ta = -20C to +85C VKA = Vref VKA = 36 V, Vref = 0 V VKA = Vref, IK = 1 mA to 50 mA 2 1 Notes Vref/Ta -- 30 -- ppm/C Vref/VKA Iref Iref(dev) -- -- -- 2.0 0.6 0.5 3.7 3 -- mV/V A A Imin Ioff ZKA -- -- -- 0.06 0.001 0.2 0.2 1.0 0.5 mA A Notes: 1. Vref(dev) = Vref(max) - Vref(min) Vref(dev) -20 Ta (C) +85 2. Imin is given by the cathode current at Vref = Vref(IK=10mA) - 15 mV. Rev.0, Sep. 2001, page 4 of 15 HA17431H Series MPAK-5 (5 pin), MPAK (3 pin) and UPAK Marking Patterns The marking patterns shown below are used on MPAK-5, MPAK and UPAK products. Note that the product code and mark pattern are different. The pattern is laser-printed. HA17431HLP NC (1) (2) HA17431HUP HA17432HUP HA17431HLTP A HA17432HLTP A NC (4) REF 4 (1) U (2) K 4W (1) (2) (1) (2) (4) (1) (2) (4) 4 (a) H (b) (c) 3 (a) C (b) (c) 3 (a) D (b) (c) A K Band mark K (3) (4) (5) A A Band mark REF (3) (4) (5) REF A REF K K REF Notes: 1. Boxes (1) to (5) in the figures show the position of the letters or numerals, and are not actually marked on the package. 2. The letters (1) and (2) show the product specific mark pattern. Product HA17431HLP HA17431HUP HA17432HUP HA17431HLTP HA17432HLTP (1) 4 4 4 3 3 (2) H U W C D 3. The letter (3) shows the production year code (the last digit of the year) for UPAK products. 4. The bars (a), (b) and (c) show a production year code for MPAK-5 and MPAK products as shown below. After 2009 the code is repeated every 8 years. Year (a) (b) (c) 2001 None None None 2002 None None Bar 2003 None Bar None 2004 None Bar Bar 2005 Bar None None 2006 Bar None Bar 2007 Bar Bar None 2008 Bar Bar Bar 5. The letter (4) shows the production month code (see table below). Production month Marked code Jan. Feb. Mar. Apr. May. Jun. Jul. Aug. Sep. Oct. Nov. Dec. A B C D E F G H J K L M 6. The letter (5) shows manufacturing code. For UPAK products. Rev.0, Sep. 2001, page 5 of 15 HA17431H Series Application Examples As shown in figure 1, this IC operates as an inverting amplifier, with the REF pin as input pin. The openloop voltage gain is given by the reciprocal of "reference voltage deviation by cathode voltage change" in the electrical specifications, and is approximately 50 to 60 dB. The REF pin has a high input impedance, with an input current Iref of 0.6 A Typ. The output impedance of the output pin K (cathode) is defined as dynamic impedance ZKA, and ZKA is low (0.2 ) over a wide cathode current range. A (anode) is used at the minimum potential, such as ground. K REF - + VCC OUT VEE VZ 2.5V A Figure 1 Operation Diagram Application Hints No. 1 Application Example Reference voltage generation circuit Vin R REF GND K CL A GND Vout Description This is the simplest reference voltage circuit. The value of the resistance R is set so that cathode current IK 0.2 mA. Output is fixed at Vout 2.5 V. The external capacitor CL (CL 3.3 F) is used to prevent oscillation in normal applications. This is circuit 1 above with variable output provided. Here, Vout 2.5 V x (R1 + R2) R2 2 Variable output shunt regulator circuit Vin R R1 REF Iref Vout K CL A GND R2 GND Since the reference input current Iref = 0.6 A Typ flows through R1, resistance values are chosen to allow the resultant voltage drop to be ignored. Rev.0, Sep. 2001, page 6 of 15 HA17431H Series Application Hints (cont.) No. 3 Application Example Single power supply inverting comparator circuit VCC RL Rin Vin REF A GND GND K Vout Description This is an inverting type comparator with an input threshold voltage of approximately 2.5 V. Rin is the REF pin protection resistance, with a value of several k to several tens of k. RL is the load resistance, selected so that the cathode current IK 0.2 mA when Vout is low. Condition Vin C1 Less then 2.5 V C2 2.5 V or more IC Vout OFF VCC (VOH) Approx. 2 V (VOL) ON 4 AC amplifier circuit VCC Cf R1 Vout Vin Cin R3 REF R2 GND R1 Gain G = (DC gain) R2 // R3 Cutoff frequency fc = 1 2 Cf (R1 // R2 // R3) K A RL This is an AC amplifier with voltage gain G = -R1 / (R2//R3). The input is cut by capacitance Cin, so that the REF pin is driven by the AC input signal, centered on 2.5 VDC. R2 also functions as a resistance that determines the DC cathode potential when there is no input, but if the input level is low and there is no risk of Vout clipping to VCC, this can be omitted. To change the frequency characteristic, Cf should be connected as indicated by the dotted line. 5 Switching power supply error amplification circuit R4 + - R1 (Note) Secondary side GND Cf R2 LED R3 V + This circuit performs control on the secondary side of a transformer, and is often used with a switching power supply that employs a photocoupler for offlining. The output voltage (between V+ and V-) is given by the following formula: Vout 2.5 V x (R1 + R2) R2 In this circuit, the gain with respect to the Vout error is as follows: G= R2 x HA17431H open x photocoupler loop gain total gain (R1 + R2) - V Note: LED : Light emitting diode in photocoupler R3 : Bypass resistor to feed IK(>Imin) when LED current vanishes R4 : LED protection resistance As stated earlier, the HA17431H open-loop gain is 50 to 60 dB. Rev.0, Sep. 2001, page 7 of 15 HA17431H Series Application Hints (cont.) No. 6 Application Example Constant voltage regulator circuit VCC R1 Q Vout R2 Cf GND R3 GND Description This is a 3-pin regulator with a discrete configuration, in which the output voltage Vout = 2.5 V x (R2 + R3) R3 R1 is a bias resistance for supplying the HA17431H cathode current and the output transistor Q base current. 7 Discharge type constant current circuit VCC R Q This circuit supplies a constant current of IL 2.5 V RS [A] into the load. Caution is required since the HA17431H cathode current is also superimposed on IL. The requirement in this circuit is that the cathode current must be greater than Imin = 0.2 mA. The IL setting therefore must be on the order of several mA or more. 2.5 V + Load RS IL GND - 8 Induction type constant current circuit VCC R + IL - Q In this circuit, the load is connected on the collector side of transistor Q in circuit 7 above. In this case, the load floats from GND, but the HA17431H cathode current is not superimposed on IL, so that IL can be kept small (0.2 mA or less is possible). The constant current value is the same as for circuit 7 above: IL 2.5 V RS [A] Load RS 2.5 V GND Rev.0, Sep. 2001, page 8 of 15 HA17431H Series Design Guide for AC-DC SMPS (Switching Mode Power Supply) Use of Shunt Regulator in Transformer Secondary Side Control This example is applicable to both forward transformers and flyback transformers. A shunt regulator is used on the secondary side as an error amplifier, and feedback to the primary side is provided via a photocoupler. Transformer R1 PWM IC HA17384 HA17385 SBD IF IB VF Phototransistor Photocoupler Light emitting diode HA17431H R2 R3 (+) Output V0 (-) VK C1 K A Vref R5 REF R4 GND Figure 2 Typical Shunt Regulator/Error Amplifier Determination of External Constants for the Shunt Regulator DC characteristic determination: In figure 2, R1 and R2 are protection resistor for the light emitting diode in the photocoupler, and R2 is a bypass resistor to feed IK minimum, and these are determined as shown below. The photocoupler specification should be obtained separately from the manufacturer. Using the parameters in figure 2, the following formulas are obtained: R1 = V0 - V F - V K V , R2 = F IF + I B IB VK is the HA17431H operating voltage, and is set at around 3 V, taking into account a margin for fluctuation. R2 is the current shunt resistance for the light emitting diode, in which a bias current IB of around 1/5 IF flows. Next, the output voltage can be determined by R3 and R4, and the following formula is obtained: V0 = R3 + R4 x Vref, Vref = 2.5 V Typ R4 The absolute values of R3 and R4 are determined by the HA17431H reference input current Iref and the AC characteristics described in the next section. The Iref value is around 0.6 A Typ. Rev.0, Sep. 2001, page 9 of 15 HA17431H Series AC characteristic determination: This refers to the determination of the gain frequency characteristic of the shunt regulator as an error amplifier. Taking the configuration in figure 2, the error amplifier characteristic is as shown in figure 3. G1 Gain G (dB) G2 When R5 0 When R5 = 0 fOSC Frequency f (Hz) f1 fAC f2 * fOSC : PWM switching frequency Figure 3 HA17431H Error Amplification Characteristic In Figure 3, the following formulas are obtained: Gain G1 = G0 50 dB to 60 dB (determined by shunt regulator) G2 = R5 R3 Corner frequencies f1 = 1/(2 C1 G0 R3) f2 = 1/(2 C1 R5) G0 is the shunt regulator open-loop gain; this is given by the reciprocal of the reference voltage fluctuation Vref/VKA, and is approximately 50 dB. Rev.0, Sep. 2001, page 10 of 15 HA17431H Series Practical Example Consider the example of a photocoupler, with an internal light emitting diode VF = 1.05 V and IF = 2.5 mA, power supply output voltage V2 = 5 V, and bias resistance R2 current of approximately 1/5 IF at 0.5 mA. If the shunt regulator VK = 3 V, the following values are found. R1 = R2 = 5V - 1.05V - 3V = 316() (330 from E24 series) 2.5mA + 0.5mA 1.05V = 2.1(k) (2.2k from E24 series) 0.5mA Next, assume that R3 = R4 = 10 k. This gives a 5 V output. If R5 = 3.3 k and C1 = 0.022 F, the following values are found. G2 = 3.3 k / 10 k = 0.33 times (-10 dB) f1 = 1 / (2 x x 0.022 F x 316 x 10 k) = 2.3 (Hz) f2 = 1 / (2 x x 0.022 F x 3.3 k) = 2.2 (kHz) Rev.0, Sep. 2001, page 11 of 15 HA17431H Series Package Dimensions As of January, 2001 Unit: mm 1.9 0.2 0.95 0.95 0.16 + 0.1 - 0.05 0.6 + 0.2 0.6 1.6 - 0.1 5 - 0.4 - 0.05 2.9 0.2 + 0.1 0.3 + 0.2 1.1 - 0.1 2.8 + 0.2 - 0.3 0 - 0.1 Hitachi Code JEDEC EIAJ Mass (reference value) MPAK-5 -- -- 0.015 g As of January, 2001 Unit: mm 4.5 0.1 0.4 1.8 Max 1 1.5 0.1 0.44 Max (2.5) (1.5) 1.5 1.5 3.0 0.8 Min 0.44 Max Hitachi Code JEDEC EIAJ Mass (reference value) (0.4) 0.53 Max 0.48 Max 2.5 0.1 4.25 Max UPAK -- Conforms 0.050 g Rev.0, Sep. 2001, page 12 of 15 (0.2) HA17431H Series As of January, 2001 Unit: mm 4.8 0.4 3.8 0.4 2.3 Max 0.55Max 0.7 0.60 Max 12.7 Min 5.0 0.2 0.5Max 1.27 2.54 Hitachi Code JEDEC EIAJ Mass (reference value) TO-92 (1) Conforms Conforms 0.25 g Rev.0, Sep. 2001, page 13 of 15 HA17431H Series As of January, 2001 Unit: mm 0.65 0.10 0.4 + 0.05 - 0.16 - 0.06 + 0.10 1.5 0.15 + 0.2 - 0.6 0 - 0.1 0.95 0.95 1.9 0.2 2.95 0.2 0.3 + 0.2 1.1 - 0.1 0.65 2.8 Hitachi Code JEDEC EIAJ Mass (reference value) MPAK -- Conforms 0.011 g Rev.0, Sep. 2001, page 14 of 15 HA17431H Series Disclaimer 1. Hitachi neither warrants nor grants licenses of any rights of Hitachi's or any third party's patent, copyright, trademark, or other intellectual property rights for information contained in this document. Hitachi bears no responsibility for problems that may arise with third party's rights, including intellectual property rights, in connection with use of the information contained in this document. 2. Products and product specifications may be subject to change without notice. Confirm that you have received the latest product standards or specifications before final design, purchase or use. 3. Hitachi makes every attempt to ensure that its products are of high quality and reliability. However, contact Hitachi's sales office before using the product in an application that demands especially high quality and reliability or where its failure or malfunction may directly threaten human life or cause risk of bodily injury, such as aerospace, aeronautics, nuclear power, combustion control, transportation, traffic, safety equipment or medical equipment for life support. 4. Design your application so that the product is used within the ranges guaranteed by Hitachi particularly for maximum rating, operating supply voltage range, heat radiation characteristics, installation conditions and other characteristics. Hitachi bears no responsibility for failure or damage when used beyond the guaranteed ranges. Even within the guaranteed ranges, consider normally foreseeable failure rates or failure modes in semiconductor devices and employ systemic measures such as failsafes, so that the equipment incorporating Hitachi product does not cause bodily injury, fire or other consequential damage due to operation of the Hitachi product. 5. This product is not designed to be radiation resistant. 6. No one is permitted to reproduce or duplicate, in any form, the whole or part of this document without written approval from Hitachi. 7. Contact Hitachi's sales office for any questions regarding this document or Hitachi semiconductor products. Sales Offices Hitachi, Ltd. Semiconductor & Integrated Circuits Nippon Bldg., 2-6-2, Ohte-machi, Chiyoda-ku, Tokyo 100-0004, Japan Tel: (03) 3270-2111 Fax: (03) 3270-5109 URL http://www.hitachisemiconductor.com/ For further information write to: Hitachi Semiconductor (America) Inc. 179 East Tasman Drive San Jose,CA 95134 Tel: <1> (408) 433-1990 Fax: <1>(408) 433-0223 Hitachi Europe Ltd. Electronic Components Group Whitebrook Park Lower Cookham Road Maidenhead Berkshire SL6 8YA, United Kingdom Tel: <44> (1628) 585000 Fax: <44> (1628) 585200 Hitachi Europe GmbH Electronic Components Group Dornacher Strae 3 D-85622 Feldkirchen Postfach 201, D-85619 Feldkirchen Germany Tel: <49> (89) 9 9180-0 Fax: <49> (89) 9 29 30 00 Hitachi Asia Ltd. Hitachi Tower 16 Collyer Quay #20-00 Singapore 049318 Tel : <65>-538-6533/538-8577 Fax : <65>-538-6933/538-3877 URL : http://semiconductor.hitachi.com.sg Hitachi Asia Ltd. (Taipei Branch Office) 4/F, No. 167, Tun Hwa North Road Hung-Kuo Building Taipei (105), Taiwan Tel : <886>-(2)-2718-3666 Fax : <886>-(2)-2718-8180 Telex : 23222 HAS-TP URL : http://www.hitachi.com.tw Hitachi Asia (Hong Kong) Ltd. Group III (Electronic Components) 7/F., North Tower World Finance Centre, Harbour City, Canton Road Tsim Sha Tsui, Kowloon Hong Kong Tel : <852>-(2)-735-9218 Fax : <852>-(2)-730-0281 URL : http://semiconductor.hitachi.com.hk Copyright (c) Hitachi, Ltd., 2001. All rights reserved. Printed in Japan. Colophon 5.0 Rev.0, Sep. 2001, page 15 of 15 |
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