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MITSUBISHI SEMICONDUCTOR < STANDARD LINEAR IC >
M62213P/FP M62213P/FP
GENERAL PURPOSE HIGHHIGH SPEED PWM CONTROL IC GENERAL PURPOSE SPEED PWM CONTROL
PIN CONFIGURATION (TOP VIEW)
DESCRIPTION
M62213P/FP is designed as a general purpose high-speed PWM control IC. This small 10 pin package contains many function and protection circuits allowing simpler peripheral circuits and compact set design. This IC can operate high speed switching (700kHz Max) with high speed PWM comparator and current limiting circuit.
VOUT 1 GND 2 CLM 3 RF 4 CF 5
10 VCC 9 EA IN 8 EA OUT 7 SOFT 6 CT
OUTLINE 10P2N-A
FEATURES
* 700kHz operation to MOS- FET * Output current Io= 1A * Totem pole output * Timer type latch protection circuit with OVP * Soft start operation is possible (with dead time control) * Built-in OPAmp for feedback control (photo coupler can be driven) * High speed pulse-by-pulse current limiting * Small size 10-pin SOP package
VOUT 1 EMIT 2 GND 3 CLM 4 RF 5 CF 6
N.C 7
OUTLINE 14P4
14 COLLECT 13 VCC 12 EA IN 11 EA OUT 10 CT 9 SOFT 8 N.C
APPLICATION
* Switching Regulator * DC-DC Converter
VCC
CLM
UVLO
CLM COMP
0.2V
S CLM LATCH R
:note COLLECT
CT (OVP)
TIMER LATCH
PWM COMP
S PWM LATCH R
VOUT
:note
2.5V OSC.
EMIT
GND
EA IN
EA OUT
SOFT (DTC)
RF
CF
note: GND terminal is connected to emitter terminal as M6213FP in IC inside. And Vcc terminal is connected to collector terminal as M6213FP in IC inside.
(1/9)
MITSUBISHI SEMICONDUCTOR < STANDARD LINEAR IC >
M62213P/FP
GENERAL PURPOSE HIGH SPEED PWM CONTROL IC
ABSOLUTE MAXIMUM RATINGS (Ta=25C, unless otherwise noted) Symbol
Vcc IOUT VCT VEA IN VCLM Pd Ktheta Topr Tstg
Parameter
Supply voltage Out terminal current CT terminal supply voltage EA IN terminal supply voltage CLM terminal supply voltage Power dissipation Thermal derating Operating temperature Storage temperature
Condition
Continuous Peak
Rating
36 150 1.0 36 10 -0.3 ~ +4.0
Unit
V mA A V V V mW mW/C C C
Ta=25C Ta25C
440 3.52 -20 ~ +85 -40 ~ +150
ELECTRICAL CHARACTERISTICS (Ta=25C, Vcc=14V, unless otherwise noted)
Block
Symbol
Vcc Vcc(START) Vcc(STOP) Vcc IccL Icco IccOFF VTHCTH VTHCTL
Parameter
Supply voltage range Operation start-up voltage Operation stop voltage
Start-up and stop voltage difference
Limits Test condition
Min
Vcc (STOP)
Typ
Max 35
Unit
V V V V A mA mA mA V V A A V nA dB MHz
11.5 7.6 3.5 90 7.5 Vcc=14V Vcc=Vcc(STOP) + 0.2V 0.9 0.8 3.5 0.4
In normal operation In CLM actuating
12.5 8.3 4.2 180 13 2.0 1.8 4.0 0.7 100 -15 2.5 -100 70 1
13.5 9.0 5.1 270 22 3.0 2.7 4.5 1.0 130 -5 2.6 0
Stand-by current Operating current Timer latch circuit current
CT term. "H" threshold voltage CT term. "L" threshold voltage CT term. discherge current CT term. cherge current
CT
ICTDCHG ICTCHG VB IB AV fT IOS VOm + VOm -
70 -33 2.4 -300
Reference voltage Input bias current Open loop gain Unity gain bandwidth Output source current Output voltage (High) Output voltage (Low) When VEAIN=0V
-140 4.7 0
-100 5.25 0.1
-60 6.25 0.3
A V V
(2/9)
MITSUBISHI SEMICONDUCTOR < STANDARD LINEAR IC >
M62213P/FP
GENERAL PURPOSE HIGH SPEED PWM CONTROL IC
ELECTRICAL CHARACTERISTICS (Ta=25C, Vcc=14V, unless otherwise noted)
Block C L M S O F T OSC.
Symbol
VTHCLM IOUTCLM TPDCLM VSOFT(0%) VSOFT(50%) Duty Max ISOFT fOSCmax fOSC VOL1 VOL2 VOH1 VOH2 TRISE TFALL
Parameter
CLM term. threshold voltage CLM term. output current CLM term. delay time
Input voltage range at 0% duty Input. voltage at 50% duty
Limits Test condition
VCLM=0V Delay time to output
Soft term. voltage range to set 0% duty Soft term. voltage at 50% duty
Min 180 -270
Typ 200 -200 90
Max 220 -140
Unit
V A nS
0 2.7 80 -65 150 90 -50 200 0.04 0.3 12.0 11.5 12.7 12.5 50 35
0.5 99 -31 700 250 0.4 1.4
V V % A KHz KHz V V V V nS nS
Maximum duty Soft term. input current
Maximum oscillation frequency
Oscillation frequency Output low voltage
CF=270pF , RF=69 k Vcc=14V,Io=10mA Vcc=14V,Io=100mA
Output high voltage Output voltage rise time Output voltage fall time
Vcc=14V,Io=-10mA Vcc=14V,Io=-100mA No load No load
(3/9)
MITSUBISHI SEMICONDUCTOR < STANDARD LINEAR IC >
M62213P/FP
GENERAL PURPOSE HIGH SPEED PWM CONTROL IC
FUNCTION DESCRIPTION AND APPLICATION (1) EA IN, EA OUT TERMINAL
Circuit for EAOUT terminal is connected to constant current load(100A typ.) shown in Fig.1. Output voltage of error amp. is controlled by the output transistor to provide currentsense comp. with the controlled voltage. 100A EA OUT To PWM comp.
Fig.1 Circuit diagram of EAOUT terminal
Peripheral circuit of Error Amp
Detected voltage devided by R1 and R2 is input to EAIN terminal in such case as fly-back system where VCC line voltage is proportional to output voltage, or in the case that the voltage detection is made on the primary side. In this case operating region is set by R1 and R2, and AC gain by R1// R2, RF. From detecting voltage
R1 EA IN R2 RF EA OUT
Reference voltage(2.5V)
Fig.2 Method to detect the voltage on the primary side In the case that feedforward system by photo-coupler is applied, following two methods are available. One is the method by error amp. as in Fig.3-1, the other is by the direct connection to photo-coupler as in Fig.3-2. When photo-coupler is directly connected to EAOUT terminal, input terminal of error amp. is connected to GND, photo-coupler is connected directly to EAOUT terminal. Vcc
R1
Reference voltage(2.5V)
Reference voltage(2.5V)
EA IN RIN EA IN R2 RF EA OUT EAOUT
Fig.3-1 Method to use photo-coupler (1)
Fig.3-2 Method to use photo-coupler (2)
(4/9)
MITSUBISHI SEMICONDUCTOR < STANDARD LINEAR IC >
M62213P/FP
GENERAL PURPOSE HIGH SPEED PWM CONTROL IC In Fig. 3-1, AC gain is represented as: | Av | = | RF/ RIN | Proper gain setting is about 40dB. RF should be 52K or more due to the current source capability of error amp. R1, R2 should meet the condition as below so that the voltage of EAIN terminal should not be over 5V. R2 * Vcc/ (R1 + R2) 5V Due to the input impedance of EAIN terminal, the current in R1, R2 should be less than several mA.
(2) CT(OVP) TERMINAL
Timer type latch circuit works as follows. Constant charge current flows out from CT terminal to the external capacitor when CLM is operative. When the voltage of CT terminal rises up to over 4.0V(typ.), the latch circuit operates to make functions of this IC inoperative. Inoperative status is sustained until supply voltage becomes less than stop voltage. The value for start-up register has to be set so that the current over 1.8mA(typ.) can flow the resistor because the stop status has to be kept by the current in start-up resistor R1 shown in application circuit. When timer latch circuit is operative, supply current increases at high voltage as shown in Fig.4 to avoid the damage caused by unnecessarily increased supply voltage. Inoperative status goes back to operation by forcibly decreasing the voltage of CT terminal to less than 0.7V.
3.0 2.5 2.0 1.5 1.0 0.5 0
5 10 15 20 25 30 35 Latch reset 8.3V
Supply voltage : Vcc (V) Fig.4 Supply current/voltage chracteristics (at timer latch)
(5/9)
MITSUBISHI SEMICONDUCTOR < STANDARD LINEAR IC >
M62213P/FP
GENERAL PURPOSE HIGH SPEED PWM CONTROL IC
Even if the timer function is not needed, latch function operates, that is, IC becomes inoperative when the voltage of CT terminal is forced to be high voltage. Therefore, CT terminal can also be used for OVP(over voltage protection). When only OVP function is needed(timer latch function is not necessary), connect the resistor between CT terminal and GND. In this case, the above mentioned charge current cannot make the voltage of CT terminal rise up to "H" threshold, thus latch function does not operate. (Refer to Fig.5-1, 5-2)
Vcc Vcc
OVP function operates when photo-coupler is ON.
CT
OVP function operates when photo-coupler is ON.
CT
Fig.5-1 Method to use timer type latch and OVP
Fig.5-2 Method to use only OVP
(3) SOFT(DUTY SET-UP) TERMINAL
The voltage of SOFT terminal determines the maximum duty. Maximum duty can be set by connecting the resistor as in Fig.6 because the constant current compensated for temperature flows out of this terminal. And by connecting the capacitor between the terminal and GND, soft start function operates. That is, we can get the gradual increase of maximum duty at start-up. Maximum duty is represented as: Duty(max.) (40.5 * VSOFT) - 58 (%) ,where VSOFT=ISOFT * RSOFT (V), ISOFT 50A(typ.) If the voltage of SOFT terminal is higher than 3.53V(typ.)(upper limit voltage of the oscillation waveform), maximum duty is internally decided to be 90%. Soft start time (TSOFT) is represented as: TSOFT CSOFT * 31 * 103 (sec) TSOFT means the time from start-up until the voltage of SOFT terminal goes up to higher than 1.4V(typ.) (lower limit voltage of the oscillation waveform). Discharging circuit operative before start-up at Vcc is internally equipped so that the soft start never fail to operate at the restart of voltage supply.
SOFT
CSOFT
VSOFT
Fig.6 Method to set up duty and SOFT start function.
(6/9)
MITSUBISHI SEMICONDUCTOR < STANDARD LINEAR IC >
M62213P/FP
GENERAL PURPOSE HIGH SPEED PWM CONTROL IC
(4) CLM TERMINAL
This terminal is for pulse-by-pulse current limiting. Current limiting circuit is almost the same as that of M51995. The voltage detected by the current detecting resistor can be directly input as shown in Fig.7-1, if the detected voltage is about the threshold voltage(200mV(typ.)), but if the voltage is larger than the threshold, the voltage has to be input divided by resistors as shown in Fig.7-2.
CLM OUT
CLM
OUT
RNF CNF RCS CNF
RNF1 RNF2 RCS
Fig.7-1 peripheral circuit of CLM
Fig. 7-2 peripheral circuit of CLM when the detected voltage is high.
1000pF to 22000pF is recommended for CNF. Be sure to use 100 or less for RNF and RNF1// RNF2 (*)so that the detection sensitivity is not influenced by the current flown out from CLM terminal. Non-inductive resistor is recommended for current detecting resistor. * RNF1//RNF2 = (RNF1 * RNF2)/(RNF1 + RNF2)
(7/9)
MITSUBISHI SEMICONDUCTOR < STANDARD LINEAR IC >
M62213P/FP
GENERAL PURPOSE HIGH SPEED PWM CONTROL IC
(5) CF TERMINAL
Oscillation frequency is set by capacitor connected to CF terminal. The waveform of CF terminal is triangular one with the ratio of 9:1 for charge-discharge period. Oscillation frequency is represented as: fOSC = 1 (19.4 * 103 * COSC) + (0.4 * 10-6) (Hz)
(6) Attention for heat generation
Although the absolute maximum rating of ambient temperature is spelled out as 85C, it is always annoying to specify the location this temperature refers to because the power dissipation generated locally in switching regulator is fairly large and the temperature in the vicinity of the IC varies from place to place. One of the recommendable ways to solve this problem is to check the teperature on the surface of the IC. The difference in temperature between IC junction and the surface of IC package is 30C or less when IC junction temperature is measured by utilizing the temperature characteristics of p-n junction forward voltage, and the surface temperature by "thermo-viewer" on the condition that the IC is mounted on the "phenol-base" PC board in normal atomosphere. This concludes that maximum case temperature (surface temperature of IC package) rating is 100C with adequate margin considering the absolute maximum rating of junction temperature is 150C.
(8/9)
MITSUBISHI SEMICONDUCTOR < STANDARD LINEAR IC >
M62213P/FP
GENERAL PURPOSE HIGH SPEED PWM CONTROL IC
(9/9)

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