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qSI-8000GL Series
SI-8000GL Series
Compact, Separate Excitation Switching Type
sFeatures
* * * * * DIP 8 pin package Output current: 1.5 A High efficiency: 91% (at VIN = 10 V, lO = 1 A, VO = 5 V) High operating efficiency of 250 kHz allows reduction of choke coil. A 1 V reference voltage (Vref) of variable output voltage type can support output voltage from 1 V to 24 V. * Wide Input Voltage Range (8 to 50 V) * Output ON/OFF capable * Built-in overcurrent protection and thermal protection circuit
sApplications
* Onboard local power supplies * OA equipment * For stabilization of the secondary stage output voltage of switching power supplies
sAbsolute Maximum Ratings
Parameter DC Input Voltage Power Dissipation Junction Temperature Storage Temperature Thermal Resistance (junction to case) Thermal Resistance (junction to ambient air) *1: Limited due to thermal protection. Symbol VIN PD*1 Tj Tstg Rth(j-c) Rth(j-a) Ratings 53 1 +125 -40 to +125 28 100 Unit V W C C C/W C/W
(Ta=25C)
sRecommended Operating Conditions
Parameter DC Input Voltage Range Output Voltage Range Output Current Range Operating Junction Temperature Range Operating Temperature Range Symbol SI-8010GL VIN VO IO Tjop Top (8 or VO+3)*1 to 50*2 0.02 to 1.5 -30 to +125 -30 to +125 1 to 24 Ratings SI-8050GL 8 to 50 -
*1: The minimum value of an input voltage range is the higher of either 8V or VO+3 V. *2: See the following table for the maximum value of the input voltage range.
sDC Input Voltage Range
60 Ta=25C
50
Input voltage range in output voltage 5-24V is VO+3-50V.
Input Voltage VIN (V)
40
30
20
10
0
0
1
2
3
4
5
Output Voltage VO (V)
1
qSI-8000GL Series
sElectrical Characteristics
Rating Parameter Symbol min. Output Voltage*1 Efficiency Switching Frequency Line Regulation Load Regulation Temperature Coefficient of Output Voltage*3 Overcurrent Protection Starting Current Quiescent Circuit Current Off Circuit Current CE/SS*5 Terminal Low Level Voltage Leak Current at Low Voltage VO(VREF)*2 Conditions Eff Conditions FOSC Conditions VOLINE Conditions VOLOAD Conditions VO/Ta VREF/Ta*4 IS Conditions Iq Conditions Iq(off) Conditions VSSL ISSL Conditions VSSL=0V VIN=12V, VON/OFF=0.3V 0.5 50 VSSL=0V 1.6 VIN=12V 7 VIN=12V, IO=0A 400 VIN=20V, VON/OFF=0.3V 0.5 50 0.97 SI-8010GL (Variable type) typ. 1.00 VIN=12V, IO=1A 86 VIN=20V, IO=1A, VO=5V 250 VIN=12V, IO=1A 20 VIN=10 to 30V, IO=1A 10 VIN=12V, IO=0.1 to 1.5A 0.5 1.6 VIN=20V 7 VIN=20V, IO=0A 400 30 40 max. 1.03 min. 4.85 SI-8050GL (On developing) typ. 5.00 VIN=20V, IO=1A 86 VIN=20V, IO=1A 250 VIN=12V, IO=1A 20 VIN=10 to 30V, IO=1A 10 VIN=20V, IO=0.1 to 1.5A 0.5 40 80 max. 5.15
(Ta=25C)
Unit
V % kHZ mV mV mV/C A mA
A
V
A
*1: Reference voltage for SI-8010GL *2: VREF for SI-8010GL
*3: Reference voltage temperature coeficient for SI-8010GL *4: VREF/Ta for SI-8010GL
*5: No. 2 terminal is a CE/SS terminal to enable soft start by connecting a capacitor. The output can be turned on and off by using a CE/SS terminal. The output is stopped by decreasing the CE/SS terminal voltage below VSSL and in order to perform ON/OFF operation of VOUT, it is required to connected NPN transistor or the output of open collector type TTL between No. 5 terminal and GND. In case that both soft start and VOUT ON/OFF are used, a protection measure such as limitation of current is required, as the discharge current of C4 flows across a transistor for ON/OFF operation, if the capacitance of C4 large. As a pull-up type resistor is provided inside the IC, no external voltage can be applied.
SI-8000GL
SI-8000GL
SI-8000GL
2 CE/SS
2 CE/SS C4
2 CE/SS C4
VO. ON/OFF
Soft start
Soft start +VO. ON/OFF
sApplication Notes
Parallel Operation: The parallel operation to increase the current is not available. Thermal Protection Characteristics: The SI-8000GL series has a thermal protection circuit. This circuit keeps the IC from the fever by the over load. But this circuit cannot guarantee the long-term reliability against the continuously over load status.
sHandling Remarks to Prevent Damage by Static Electricity
Considerations to protect the Products from Electrostatic Discharge * When handling the devices, operator must be grounded. Grounded wrist straps be worn and should have at least 1 M of resistance near operators to ground to prevent shock hazard. * Workbenches where the devices are handled should be grounded and be provided with conductive table and floor mats. * When using measuring equipment such as a curve tracer, the equipment should also be grounded. * When soldering the devices, the head of a soldering iron or a solder bath must be grounded in other to prevent leak voltage generated by them being applied to the devices. * The devices should always be stored and transported in our shipping containers or conductive containers, or be wrapped up in aluminum foil.
2
qSI-8000GL Series
sExternal Dimensions
6.50.2
(Unit: mm)
8 a
7
6 8010GL b c
5
SK
1
2
3
4
9.40.3
Pin Arrangement 1. GND 2. CE/SS 3. Reg 4. SWOUT 5. VIN 6. B.S 7. Comp 8. VREF (SI-8010GL) VS (SI-8050GL)
a. Part Number Display b. Lot Number (3 digits) 1st character Year (last digit) 2nd character Month Jan-Sep: Arabic numerals Oct: O Nov: N Dec: D 3rd character Week 01-05: Arabic numerals c. Administration Number (4 digits)
1.0+0.3 -0.05
4.20.3 3.40.1 7.50.5
7.6
1.5+0.3 -0.05
+0.1 0.25-0.05
3.30.2
015 2.54 0.50.1 0.25 M
0.89 TYP
sBlock Diagram
SI-8010GL
VIN
SI-8050GL
VIN
UVLO CE/SS CE/SS
P.REG
OCP CE/SS Boot REG BS
UVLO CE/SS
P.REG
OCP BS
Boot REG TSD
TSD
DRIVE Reg OSC
+ -
DRIVE Reg OSC
+ -
PWM LOGIC
SWOUT
PWM LOGIC
SWOUT
VREF Comp
Amp +
VS Comp
Amp +
1V
1V
GND
GND
3
qSI-8000GL Series
sStandard External Circuit
SI-8010GL
6
B.S
5
R1 L1 C3
VIN
2 C1
VIN CE/SS
C7
SI-8010GL
Comp
7 C5 C6
SWOUT
4 D1 R2 C9
V0
+
Reg
3 C4
GND
1
VREF
+
C2 C8
8 R3 IREF
GND
GND
SI-8050GL
6
B.S
5
R1 L1 C3
VIN
2 C1
VIN CE/SS Reg
3 C4 C5
SI-8050GL
Comp
7 C6
SWOUT
4 D1
V0
C1: 220F/63V C2: 470F/25V C3: 0.1F C4: 1000pF C5: 0.1F C6: 0.047F C7: 0.1F C8: 0.1F C9: 6800pF R1: 47 L1: 47H D1: RK16 (Sanken)
+
GND
1
VS
+
8 C2
GND
GND
Diode D1 * The schottky-barrier diode must be used for D1. If other diodes like fast recovery diodes are used, IC may be destroyed because of the reverse voltage applied by the recovery voltage or ON voltage. Choke coil L1 * If the winding resistance of the choke coil is too high, the efficiency may go down to the extent that it is out of the rating. * As the overcurrent protection start current is approx. 2.5 A, attention must be paid to the heating of the choke coil by the magnetic saturation due to overload or short-circulated load. Capacitor C1, C2 * As large ripple currents flow across C1 and C2, capacitors with high frequency and low impedance for SMPS must be used. Especially when the impedance of C2 is high, the switching waveform may not be normal at low temperature. Please use neither OS capacitor nor tantalum capacitor which causes an abnormal oscillation for the C2. In order to have optimum operating condition, each component must be laid out with the minimum distance.
4
qSI-8000GL Series
sExample of Pattern on PC Board
SI-8010GL
C9 C6
VIN
R2 R3 C1
+
C7 C2
R1
+ GND
C3 D1 L1 C8
V0
C4
C5
Recommended Pattern *For the optimum conditions, use one-point GND wiring centering on pin 1, and place each component as closely as possible.
sTa-PD Characteristics
100 VO -1 -VF * IO 1- VIN
PD=VO * IO
1.8 1.6 1.4 1.2
j-a:100C/W
Power Dissipation PD (W)
1 0.8 0.6 0.4 0.2 0 -25 0 25 50 75 100 125
Note 1: The efficiency depends on the input voltage and the output current. Thus, obtain the value from the efficiency graph and substitute the percentage in the formula above. Note 2: Thermal design for D1 must be considered separately. VO : Output voltage VIN: Input voltage IO : Output current : Efficiency VF : Diode forward voltage RK16***0.4V(IO=1A)
Ambient Temperature Ta (C)
sPackaging specifications
Minimum package Stick Qty: 50 pcs/1 stick
5.01.0
11.60.2
(Unit: mm)
Stopper (with fin)
4.20.15 130.2 5051.0
5.70.2
Stopper (without fin) 50pcs
5
qSI-8000GL Series
sTypical characteristics (SI-8010GL)
Efficiency Characteristics
100 VO=24V 90 VO=5V Ta=25C IO=1.5A
1A
Output Voltage
1.2 *Load=C.R Ta=25C
Load Regulation
1.03 Ta=25C
1.0
1.02
Output Voltage VO (V)
0.8 IO=0.02A 1A 1.5A 0.6
Output Voltage VO (V)
0.5A
Efficiency (%)
1.01 VIN=8V 12V 1.00 20V 30V 0.99
80
IO=1.5A 1A 0.5A IO=1.5A
70
VO=1.8V
0.4
60 1A 50 0.5A 0 10 20 30 40 50
0.2
0.98
0
0
5
10
15
20
0.97
0
0.5
1.0
1.5
Input Voltage VIN (V)
Input Voltage VIN (V)
Output Current IO (A)
Overcurrent Protection Characteristics
1.2 Ta=25C VIN=30V 20V 12V 8V 1.0
Thermal Protection Characteristics
1.2 VIN=12V, IO=0.02A
Temperature Characteristics
300 VIN=12V, IO=1A 1.015
Frequency Freq (kHz) Efficiency (%)
1.0
250
Freq
1.01
Output Voltage VO (V)
Output Voltage VO (V)
0.8
0.8
200
1.005
0.6
0.6 TSD OFF 0.4 TSD ON
150 VO 100
1
0.4
0.995
0.2
0.2
0
0
1
2
3
4
0 50
100
150
200
50 -50
0 50 100
0.99 150
Output Current IO (A)
Ambient Temperature Ta (C)
Ambient Temperature Ta (C)
6
Output Voltage VO (V)

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