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AAT1100-T1-T Datasheet

  • AAT1100-T1-T

  • TRIPLE-CHANNEL PWM CONTROLLER

  • 459.93KB

  • 15頁

  • ETC

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Advanced Analog Technology, Inc.
AAT1100
Product information presented is current as of publication date. Details are subject to change without notice
TRIPLE-CHANNEL PWM CONTROLLER
Features
Complete PWM Power Control Circuitry
Precision Reference錛?.25V鹵1% (25
o
C)
Low Operating Voltage錛?.5V to 7.0V
Under-Voltage Lockout Protection
Totem Pole Output
Output Short Circuit Protection
Low Dissipation Current錛?/div>
2.5mA at 500 kHz and 50% Duty Cycle
Separate On / Off Control for CH1, CH3 Pair
and CH2 (Refer to Function Table)
Dead Time Control錛? to 100%
Wide Operating Frequency錛?0 kHz to 1MHz
Minimized External Components
General Description
The AAT1100 provides an integrated triple-channel
pulse-width-modulation (PWM) solution for the
power supply of DC-DC system; this device offers
system engineer the flexibility to custom-make the
power supply circuitry to a specific application.
Each channel contains its own error amplifier,
PWM comparator, dead鈥搕ime control (DTC) and
output driver. The under-voltage protection,
oscillator, short circuit protection and voltage
reference circuit are common features of the three
channels.
The AAT1100 contains two boost circuits (CH1,
CH3) and a buck-boost circuit (CH2). DTC can be
set to provide 0% to 100% dead-time through a
divider network. Soft-Start can be implemented by
paralleling the DTC resistor with a capacitor. Two
DTC inputs are assigned for CH1, CH3 pair and
CH2 individually, and DTC inputs can be used to
control on / off operation. In addition, this device
can operate from 2.5V to 7.0V supply voltages to
achieve efficient operation in low power system.
With a minimal number of external components, the
AAT1100 offers a simple and cost effective
solution.
Pin Configuration
TOP VIEW
IE2
OE 2
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
OE3
IE3
IE1
OE 1
OSC
DTC2
DTC13
V
REF
V
DD
OUT2
OUT3
OUT1
GND
SCP
(TSSOP-16 PACKAGE)
鈥?/div>
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鈥?/div>
鈥?/div>
Advanced Analog Technology, Inc
.
鈥?/div>
Page 1 of 15
V 1.0

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