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FA7613CP(E) FA7613CP(E)
s Description
The FA7613CP(E) is a bipolar IC containing basic circuit necessary for PWM-type switching power supply control. The supply voltage range is from 2.5V.
Bipolar IC For Switching Power Supply Control
s Dimensions, mm SSOP-16
16 9
s Features
* Low-voltage operation (VCC = 2.5 to 22V) * Open collector output * Latch-mode short-circuit protection function (no malfunction due to electrical noise) * Soft-strat function * Output ON/OFF control function * Low standby current (Max. 10A) * Not many external discrete components needed
5.3 7.90.3
1
0.10.1
6.2
+0.1
8
0.2 -0.05
0~10
s Applications
* Battery power supply for portable equipment
0.6
0.3
0.65
DIP-16
16 9
1 0.81
19.4 1.5
8 3.1min 4.3max
0.2min
3.4
6.5
.0 0.3 -0
+0.1 5
7.6
2.540.25
0.50.1
0~15
0~1
5
s Block diagram
Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Pin symbol Description -- Reference voltage output(1.25V) Non-inverting input to error amplifier Inverting input to error amplifier Error amplifier output Dead time adjustment Ground -- -- Output Power supply Capacitor for short-circuit protection and delay Oscillator timing capacitor Oscillator timing resistance Output ON/OFF control --
NC REF IN (+) IN (-) FB DT GND NC NC OUT VCC SCP CT RT ON/OFF NC
1
2.1max
FA7613CP(E)
s Absolute maximum ratings
Item Supply voltage Reference voltage output current Output sink current Total power dissipation Operating temperature Storage temperature Symbol Rating 22 5 50 400 -20 to +85 -40 to +150 Unit V mA mA mW C C
s Recommended operating conditions
Item Supply voltage Feedback resistance Oscillator timing capacitor Oscillator timing resistance Oscillation frequency Symbol Min. 2.5 100 220 4.7 10 22,000 100 500 Max. 20 Unit V k pF k kHz
VCC IOR ISINK Pd Topr Tstg
VCC RNF CT RT fOSC
s Electrical characteristics (Ta = 25C, VCC = 5V, fOSC = 100kHz) Reference voltage section
Item Output voltage Line regulation Load regulation Output voltage variation due to temperature change Symbol Test condition Min. 1.210 Typ. 1.235 1 5 -1 -1 Max. 1.260 5 10 1 1 Unit V mV mV % %
VREF LINE LOAD VTC1 VTC2
IOR = 1mA VCC = 2.5 to 20V IOR = 0.1 to 1mA
Ta = -20 to +25C Ta = +25 to +85C
Oscillator section
Item Oscillation frequency Frequency variation 1 (due to supply voltage change) Frequency variation 2 (due to temperature change) Symbol Test condition Min. 120 Typ. 140 2 4 Max. 160 Unit kHz % %
fOSC fdV fdT
CT = 1000pF, RT = 4.7k VCC = 2.5 to 20V
Ta = -20 to +85C
Error amplifier section
Item Input bias current Symbol Test condition Pin 3 = 1.25V Pin 4 = 1.25V 70 1.0 RNF = 200k 4.8 200 25 50 100 Min. Typ. 0.1 0.1 Max. 1.0 1.0 Unit
IB+ IB- AV GB VOM+ VOM- IOM+
A A
dB MHz V mV
Open-loop voltage gain Unity-gain bandwidth Maximum output voltage (Pin 5)
RNF = 200k VOM = 1V
Output source current (Pin 5)
A
PWM comparator section
Item Input threshold voltage (Pin 5) Input threshold voltage (Pin 5) Symbol Test condition Duty cycle = 0% Duty cycle = 50% Min. Typ. 0.80 1.13 Max. 0.90 Unit V V
VTH0 VTH50
2
FA7613CP(E)
Dead time adjustment circuit section
Item Input bias current(Pin 6) Input threshold voltage (Pin 6) Input threshold voltage (Pin 6) Symbol Test condition Duty cycle = 0% Duty cycle = 50% Min. Typ. 0.3 0.10 0.47 Max. 1.0 0.20 Unit
IBDT VTH DT0 VTH DT50
A
V V
Short-circuit protection circuit section
Item Input threshold voltage (Pin 5) Charge current (Pin 12) Latch-mode threshold voltage (Pin 12) Symbol Test condition Min. 2.05 Pin 12 = 0V, Pin 6, Pin 5 = 2V 15 0.90 Typ. 2.35 35 1.20 Max. 2.65 55 1.50 Unit V
VTH PC ICHG VL
A
V
Output section
Item L-level output voltage (Pin 10) Symbol Test condition Output sink current = 20mA Min. Typ. 1.0 Max. 1.5 Unit V
VOL
Output ON/OFF circuit section
Item Input current (Pin 15) OFF-to-ON threshold voltage (Pin 15) Symbol Test condition Pin 15 = 5V Min. 0.5 0.6 Typ. 1.0 0.8 Max. 2.0 1.0 Unit mA V
ION/OFF VTH ON
Overall device
Item Standby current Supply current Operating-state supply current Symbol ICC ST Test condition Pin 15 = 0V Latch mode Min. Typ. 0.5 1.5 2.0 Max. 10 2.5 4.0 Unit
A
mA mA
ICC LA ICC AV
RL = Duty cycle = 50%
s Characteristic curves (Ta = 25C)
Oscillation frequency (fOSC) vs. timing capacitor capacitance (CT) Output duty cycle vs. DT terminal voltage (VDT)
CT [pF]
Output duty cycle [%]
fOSC (kHz)
VDT [V]
3
FA7613CP(E)
Output duty cycle vs. FB terminal voltage (VFB) L-level output voltage (VOL) vs. output sink current (ISINK)
Supply current (ICC) vs. supply voltage (VCC)
Error amplifier frequency (f) vs. voltage gain (AV)
Output ON/OFF control terminal input current (ION/OFF) vs. voltage(VON/OFF)
ION/OFF [mA]
VON/OFF [V]
VOL [V]
4
FA7613CP(E)
s Application circuit Flyback-transformer type converter circuit
Parts tolerances characteristics are not defined in the circuit design sample shown above. When designing an actual circuit for a product, you must determine parts tolerances and characteristics for safe and economical operation. Please connect a capacitor, which the value is about 0.01F to 0.1F, between VCC and REF terminals in order to prevent from irregular output pulse at start-up.
5

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