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參數(shù)資料
| 型號(hào)： | FA3686V |
| 英文描述： | SMPS Controller |
| 中文描述： | 開關(guān)電源控制器 |
| 文件頁(yè)數(shù)： | 1/18頁(yè) |
| 文件大?。?/td> | 389K |
| 代理商： | FA3686V |
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1
I
Block diagram
FA3686V
I
Dimensions, mm
TSSOP-16
I
Description
FA3686V is a PWM type DC-to-DC converter control IC with
2ch outputs that can directly drive power MOSFETs. CMOS
devices with high breakdown voltage are used in this IC and
low power consumption is achieved. This IC is suitable for very
small DC-to-DC converters because of their small and thin
package (1.1mm max.), and high frequency operation (to
1.5MHz). This IC contains built-in an error amplifier for series
regulators, therefore, this IC is suitable for the 3ch power supply
with a 2ch DC-to-DC converter and a 1ch series regulator.
I
Features
Wide range of supply voltage: V
CC
=2.5 to 20V
MOSFET direct driving
Low operating current consumption by CMOS process:
3.0mA (typ.)
2ch PWM control IC
High frequency operation: 300kHz to 1.5MHz
Simple setting of operation frequency by timing resistor
Built-in error amplifier for series regulator
Soft start function on each channel (1ch, 2ch only)
Maximum output duty cycle: 85% (typ.), at 500kHz
Built-in under voltage lockout
High accuracy reference voltage: VREF: 1.00V±1%,
V
REG
: 2.20V±1%
Timer latch for short-circuit protection with counter
PGS pin for a power supply fault signal
Thin and small package: TSSOP-16
CMOS IC
For Switching Power Supply Control
Pin No. Pin symbol Description
1
FB3
Ch.3 output of error amplifier
2
IN3-
Ch.3 inverting input to error amplifier
3
FB2
Ch.2 output of error amplifier
4
IN2-
Ch.2 inverting input to error amplifier
5
PGS
PGS signal output
6
VCC
Power supply
7
CS2
Soft start for Ch.2
8
OUT2
Ch.2 output
9
OUT1
Ch.1 output
10
CS1
Soft start for Ch.1
11
GND
Ground
12
RT
Oscillator timing resistor
13
VREG
Regulated voltage output
14
IN1-
Ch.1 inverting input to error amplifier
15
FB1
Ch.1 output of error amplifier
16
TL
Timer latched short circuit protection
1
8
9
16
0
0.65
6
±
0
0
0
4
5
0.22
±
0.02
0.5
±
0.08
1
0
±
0
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