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FA7616CP(E)(V)
s Description
The FA7616CP(E)(V) is a bipolar control IC having two channels of PWM-type switching regulator control circuits. With this IC, a DC-to-DC converter can be easily implemented for a minimum input voltage of 1.4V.
Bipolar IC For Switching PowerFA7616CP(E)(V) Supply Control
s Dimensions, mm TSSOP-16
16 9
1
0.10.1
5.00.1
8
0.15 -0.06
+0.05
* Input voltage from 1.4V (VCC = 1.4 to 12V) * Open-collector output * Wide operating frequency range (fOSC: 10 to 500kHz) * Output ON/OFF control function * Not many external discrete components are needed
4.40.1 6.40.2
s Features
s Applications
* Battery power supply (two, 1.5V batteries) for portable equipment
0.24 -0.07
+0.08
0~10
0.6
0.65
s Block diagram
SSOP-16
16 9
5.3 7.90.3
1
0.10.1
6.2
+0.1
8
0.2 -0.05
0~10
0.6
0.3
0.65
DIP-16
16 9
Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Pin symbol
Description IC main power supply Oscillator timing capacitor Non-inverting input to error amplifier Inverting input to error amplifier Error amplifier output Dead time adjustment CH. 2 Output Ground CH. 1 Output Dead time adjustment Error amplifier output Inverting input to error amplifier Start-up circuit timing capacitor Start-up circuit power supply Output ON/OFF control Reference voltage output (1.20V)
1 0.81
19.4 1.5
8 3.1min 4.3max
0.2min
VCC2 CT IN2 (+) IN2 (-) FB2 DT2 OUT2 GND OUT1 DT1 FB1 IN1 (-) CST VCC1 ON/OFF REF
3.4
6.5
0.3 -0
7.6
+0.1 5 .0
2.540.25
0.50.1
0~15
0~1
5
2.1max
1.2max
1
FA7616CP(E)(V)
s Absolute maximum ratings
Item Supply voltage Symbol Rating 12 5 10 300 -20 to +85 -40 to +150 Unit V mA mA mW C C
s Recommended operating conditions
Item Supply voltage 1 Symbol Min. 1.4 2.5 Max. 12 12 3 5 10 47 220 4.7 100 500 10,000 10,000 47 Unit V V mA mA kHz pF pF k k
VCC Reference voltage output current IOR Output sink current IO Total power dissipation Pd
Operating temperature Storage temperature
VCC1 Supply voltage 2 VCC2 Output sink current (at start-up) ISINK Output sink current ISINK
(at steady state) Oscillation frequency Oscillator timing capacitor (start-up circuit) Oscillator timing capacitor Oscillator timing resistance Feedback resistance
Topr Tstg
fOSC CST CT RT RNF
s Electrical characteristics (Ta = 25C, VCC1 = 1.6V, VCC2 = 3V, V15 = 2V, CT = 1000pF, RT = 10k) Reference voltage section
Item Output voltage Line regulation Load regulation Output voltage variation due to temperature change Symbol Test condition Min. 1.196 Typ. 1.220 1 1 -2 -2 -0.3 -0.6 Max. 1.244 8 8 1 1 Unit V mV mV % %
VREF LINE LOAD
VTC1
IOR = 0.1mA VCC = 2.5 to 12V, V15 = 2V fixed IOR = 0.1 to 1mA
Ta = -20 to +25C IOR = 0.1mA Ta = +25 to +85C IOR = 0.1mA
VTC2
Oscillator section
Item Oscillation frequency Frequency variation 1 (due to supply voltage change) Frequency variation 2 (due to temperature change) Symbol Test condition Min. 80 Typ. 92 1 2 Max. 110 3 Unit kHz % %
fOSC fdV fdT
CT = 1000pF, RT = 10k VCC = 2.5 to 12V
Ta = -20 to +85C
Error amplifier section
Item Input offset voltage Input bias current Common-mode input voltage Open-loop voltage gain Unity-gain bandwidth Maximum output voltage Output source current Symbol Test condition Min. Typ. 2 0 70 1.0 Max. 10 1 Unit mV
VIO IB VCM AV GB VOM+ VOM- IOM+ RNF = 100k RNF = 100k VOM = 1V
A
dB MHz V
VCC2-1.7 V
VCC2-0.5
200 40 85 170
mV
A
PWM comparator section
Item Input threshold voltage Input threshold voltage Symbol Test condition Duty cycle = 0% Duty cycle = 100% Min. Typ. 0.80 1.45 Max. Unit V V
VTH0 VTH100
2
FA7616CP(E)(V)
Dead time adjustment circuit section
Item Input threshold voltage Input threshold voltage Symbol Test condition Duty cycle = 0% Duty cycle = 100% Min. 0.08 Typ. 0.15 0.80 0.95 Max. Unit V V
VTH DT0 VTH DT100
Output ON/OFF circuit section
Item ON/OFF threshold voltage Input current Symbol Test condition Min. 0.5 Pin 15 = 2V Typ. 0.9 650 Max. 1.2 850 Unit V
VTH ON II ON
A
Start-up circuit section
Item Oscillation frequency ON duty cycle Threshold voltage to stop Symbol Test condition Min. Typ. 95 50 2.30 Max. 115 60 2.45 Unit kHz % V
fSC DST VCC2 TH
CST = 1000pF, VCC2 = 0.5V 70 CST = 1000pF, VCC2 = 0.5V 40
ON-to-OFF threshold voltage 2.15 at start-up circuit
Output section
Item Output leakage current L-level output voltage Symbol Test condition Min. Typ. Max. 5 0.25 0.55 Unit
ILEAK VOL
VO = 12V
Output sink current =5mA
A
V
Overall device
Item Standby current 1 Standby current Standby current 2 Operating-state supply current Symbol Test condition Pin 15 = 0V or VCC2 > 2.45V Pin 15 = 2V, VCC2 < 2.15V Pin 15 = 0V, VCC2 = 3V Pin 15 = 2V, VCC2 = 3V Min. Typ. 0.1 400 0.4 2.2 Max. 10 800 0.7 3.2 Unit
ICC ST1 ICC STAR ICC ST2 ICC AV
A A
mA mA
s Characteristic curves (Ta = 25C)
Oscillation frequency (fOSC) vs. timing capacitor capacitance (CST) and output duty cycle At strat-up state Oscillation frequency (fOSC) vs. timing capacitor capacitance (CT) At steady state
3
FA7616CP(E)(V)
Output duty cycle vs. DT terminal voltage (VDT) Output duty cycle vs. FB terminal voltage (VFB)
L-level output voltage (VO1L) vs. CH. 1 output sink current (ISINK1) At start-up state
L-level output voltage (VOL) vs. output sink current (ISINK) At steady state
Supply current (ICC) vs. supply voltage (VCC)
Error amplifier frequency (f) vs. voltage gain (AV)
4
VOL [V]
FA7616CP(E)(V)
s Application circuit Flyback-transformer type and chopper type boost 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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