FA7615CP(E)
s
Description
The FA7615CP(E) is a bipolar IC containing basic circuit
necessary for PWM-type switching power supply control. This
IC can be operated by external synchronizing pulses.
Bipolar IC
For Switching Power Supply Control
FA7615CP(E)
s
Dimensions, mm
SSOP-16
16
9
s
Features
•
•
•
•
External synchronization input terminal
Low-voltage operation (V
CC
= 3.6 to 22V)
Totem-pole predriver
Latch-mode short-circuit protection function (no malfunction
due to electrical noise)
• One capacitor shared for short-circuit protection and for soft-
start to minimize the number of external discrete components
5.3
7.9
±0.3
1
0.1
±0.1
6.2
+0.1
8
0.2
–0.05
s
Applications
• Battery power supply for portable equipment
0.3
0.65
0~10˚
0.6
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
2.54
±0.25
0.5
±0.1
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
Oscillator timing capacitor
Capacitor for soft-start,
short-circuit protection and delay
Dead time adjustment
Non-inverting input to error
amplifier
Inverting input to error amplifier
Error amplifier output
Ground
CH. 2 Output
Power supply
CH. 1 Current limiting resistor
CH. 1 Output
Error amplifier output
Inverting input to error amplifier
Dead time adjustment
External synchronization input
Reference voltage output (2.5V)
CT
CS
DT2
IN2 (+)
IN2 (–)
FB2
GND
OUT2
VCC
OUT1R
OUT1
FB1
IN1 (–)
DT1
SYNC
REF
2.1max
1
FA7615CP(E)
s
Absolute maximum ratings
Item
Supply voltage
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.
3.6
100
220
10
5
22,000
100
200
Max.
20
Unit
V
kΩ
pF
kΩ
kHz
V
CC
Reference voltage output current
I
OR
Output current
I
O
Total power dissipation
P
d
Operating temperature
Storage temperature
V
CC
R
NF
C
T
R
T
f
OSC
T
opr
T
stg
s
Electrical characteristics
(Ta = 25°C, V
CC
= 6V, R
T
= 47kΩ, C
T
= 1000pF)
Reference voltage section
Item
Output voltage
Line regulation
Load regulation
Output voltage variation due to temperature change
Symbol
Test condition
Min.
Typ.
2.432
4
1
Max.
2.481
12
6
1
1
Unit
V
mV
mV
%
%
V
REF
L
INE
L
OAD
V
TC1
V
TC2
I
OR
= 1mA
2.383
V
CC
= 3.6 to 20V, I
OR
= 1mA
I
OR
= 0.1 to 1mA
Ta = –20 to +25°C
Ta = +25 to +85°C
–1
–1
Oscillator section
Item
Oscillation frequency
Frequency variation 1 (due to supply voltage change)
Frequency variation 2 (due to temperature change)
Synchronizing terminal input current
Synchronizing terminal input voltage
Symbol
Test condition
Min.
17
Typ.
20
1
5
0.4
1
1.0
2.5
Max.
23
Unit
kHz
%
%
mA
V
f
OSC
f
dV
f
dT
I
SYNC
V
SYNC
C
T
= 1000pF,
R
T
= 47kΩ
V
CC
= 3.6 to 20V
Ta = –20 to +85°C
V
SYNC
= 2V
Error amplifier section
Item
Reference voltage
Input bias current
Open-loop voltage gain
Unity-gain bandwidth
Maximum output voltage (Pin 6 and Pin 12)
Output source current (Pin 6 and Pin 12)
Symbol
Test condition
Min.
0.484
70
1.0
R
NF
= 100kΩ
Typ.
0.494
5
Max.
0.504
100
Unit
V
nA
dB
MHz
V
200
40
85
200
mV
V
B
I
B
A
V
G
B
V
OM+
V
OM–
I
OM+
R
NF
= 100kΩ
V
OM
= 1V
V
REF
–0.2
µ
A
PWM comparator section
Item
Input threshold voltage (Pin 6 and Pin 12)
Input threshold voltage (Pin 6 and Pin 12)
Symbol
Test condition
Duty cycle = 0%
Duty cycle = 50%
Min.
Typ.
0.38
0.6
Max.
0.48
Unit
V
V
V
TH0
V
TH50
2
FA7615CP(E)
Dead time adjustment circuit section
Item
Input bias current (Pin 3 and Pin 14)
Input threshold voltage (Pin 3 and Pin 14)
Input threshold voltage (Pin 3 and Pin 14)
Symbol
Test condition
Duty cycle = 0%
Duty cycle = 50%
Min.
Typ.
80
0.38
0.60
Max.
300
0.48
Unit
nA
V
V
I
BDT
V
TH DT0
V
TH DT50
Short-circuit protection circuit section
Item
Input threshold voltage (Pin 6 and Pin 12)
Charge current (Pin 2)
Latch-mode threshold voltage (Pin 2)
Symbol
Test condition
Min.
1.60
Pin 2 = 0V, Pin 6, Pin 12 = 2V 18
1.60
Typ.
1.80
30
1.80
Max.
2.00
42
2.00
Unit
V
V
TH PC
I
CHG
V
TH LA
µ
A
V
Undervoltage lockout section
Item
OFF-to-ON threshold voltage
ON-to-OFF threshold voltage
Voltage hysteresis
Symbol
Test condition
Min.
Typ.
2.65
2.60
50
Max.
Unit
V
V
mV
V
TH ON
V
TH OFF
V
HYS
Output section
Item
Output saturation voltage
H-level (CH.1)
Symbol
Test condition
Output source current = 20mA
Output sink current = 20mA
Pin 11 = 0V
6
19
Min.
Typ.
0.3
0.3
11
27
Max.
0.8
0.8
15
36
Unit
V
V
mA
mA
V
O1H
L-level (Common to CH.1 and CH.2)
V
O1L/2L
CH. 1 Output source current (Pin 11)
I
SOURCE1
CH. 2 Output source current (Pin 8)
I
SOURCE2
V
CC
= 16V, Pin 8 = 0V
Overall device
Item
Supply current
Operating-state supply current
Symbol
Test condition
Latch mode
Min.
Typ.
2.0
3.5
Max.
3.0
6.0
Unit
mA
mA
I
CC LA
I
CC AV
R
L
=
∞
Duty cycle = 50%
3
FA7615CP(E)
s
Characteristic curves
(Ta = 25°C)
Oscillation frequency (f
OSC
) vs.
timing resistor resistance (R
T
)
Output duty cycle vs. CS terminal voltage (V
CS
)
Output duty cycle vs. DT terminal voltage (V
DT
)
Output duty cycle vs. FB terminal voltage (V
FB
)
H-level output saturation voltage (V
O1H
)
vs. CH. 1 output source current (I
SOURCE1
)
CH-2 output source current (I
SOURCE2
)
vs. supply voltage (V
CC
)
V
O1H
[V]
I
SOURCE
[mA]
4
FA7615CP(E)
L-level output voltage (V
OL
) vs. output sink current (I
SINK
)
Supply current (I
CC
) vs. supply voltage (V
CC
)
Error amplifier frequency (f) vs. voltage gain (AV)/phase (θ)
f [Hz]
Phase
θ
[deg]
A
V
[dB]
5
NXP MCU
