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AAT1100 PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 AAT1100
기능 TRIPLE-CHANNEL PWM CONTROLLER
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AAT1100 데이터시트, 핀배열, 회로
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
z Complete PWM Power Control Circuitry
z Precision Reference 1.25V±1% (25 oC)
z Low Operating Voltage 2.5V to 7.0V
z Under-Voltage Lockout Protection
z Totem Pole Output
z Output Short Circuit Protection
z Low Dissipation Current
2.5mA at 500 kHz and 50% Duty Cycle
z Separate On / Off Control for CH1, CH3 Pair
and CH2 (Refer to Function Table)
z Dead Time Control 0 to 100%
z Wide Operating Frequency 50 kHz to 1MHz
z Minimized External Components
Pin Configuration
IE2
OE 2
VDD
OUT2
OUT3
TOP VIEW
1 16 OE3
2 15 IE3
3 14 IE1
4 13 OE 1
5 12 OSC
OUT1
6
11 DTC2
GND 7
10 DTC13
SCP 8
9 VREF
(TSSOP-16 PACKAGE)
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–time 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.
––
Advanced Analog Technology, Inc.
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AAT1100 pdf, 반도체, 판매, 대치품
Advanced Analog Technology, Inc.
AAT1100
Electrical Characteristics, VDD = 3.3V ; TC = 25 oC (Unless Otherwise Specified)
Oscillator
Parameter
Oscillator Frequency
Oscillator Output Voltage at
High
Oscillator Output Voltage at
Low
Frequency Change with
VDD
Frequency Change with
Temperature
Oscillator Output Current
f OSC
VOSCH
VOSCL
f V
f T
I OSC
Test Condition
COSC = 130pF,
R OSC = 7 k
COSC = 130pF,
R OSC = 7 k
COSC = 130pF,
R OSC = 7 k
VDD = 2.5V to 7V,
COSC = 130pF,
R OSC = 7 k
(Note 2)
Min Typ Max Unit
400 500 600 kHz
0.95 1.00 1.05 V
0.35 0.40 0.45 V
1 2%
5 10 %
180 200 220 µA
Under-Voltage Protection
Parameter
Upper Threshold Voltage
Lower Threshold Voltage
Hysteresis ( VUPH – VUPL )
VUPH
VUPL
VHYS
Test Condition
Min Typ Max Unit
2.2 2.3 2.4 V
2.0 2.1 2.2 V
0.1 0.2 0.3 V
Short Circuit Protection Control
Parameter
Input Threshold Voltage
Latch Reset Threshold
Voltage
Short Circuit Detect
Threshold Voltage
SCP Terminal Source
Current
Vr1
Vr 2
VR
Vr 3
ISCP
Test Condition
CH1, CH3
CH2
Min Typ Max Unit
1.10 1.15 1.20
0.20 0.25 0.30 V
0.8 1.5 1.8 V
1.20 1.25 1.30 V
1.4 2.0 2.6 µA
Note 2: The deviation is defined as the difference between the maximum and minimum values obtained over the
recommended temperature range (-20 oC to 85 oC).
––
Advanced Analog Technology, Inc.
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AAT1100 전자부품, 판매, 대치품
Advanced Analog Technology, Inc.
Block Diagram
AAT1100
OE1
IE 1
Vref = 1.2 5V
OE2
EA1
IE 2
Vr5 = 0.7V
OE3
IE 3
V R E F = 1 .2 5V
EA2
EA3
V REF
V REF
VREF
UVC
PW M C1
PW M C2
PW M C3
O SC
D T C 2N
UVC
R
Vr5 = 0.7V
R
D T C 13
Vr4 =
0.2 5V
DTC2
V r4 = 0.2 5V
OE1
Vr1 = 1.1 5V
OE3
UVCN
OE2
V r 2 = 0.2 5V
E N 13
EN2
E N 13
L atch
OUT1
EN2
L atch
OUT2
E N 13
L atch
O UT3
O SC
UVC
L atch
UVLO
UVCN
SCP
VDD
GND
VDD
2µA
V r 3 = 1.2 5V
SC P
UVCN
Note: All voltage and current values in block diagram are nominal.
––
Advanced Analog Technology, Inc.
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