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AAT1236 Datasheet(PDF) 4 Page - Advanced Analog Technology, Inc.

Part No. AAT1236
Description  High Efficiency White LED Drivers for Backlight and Keypad
Download  24 Pages
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Maker  AAT [Advanced Analog Technology, Inc.]
Homepage  http://www.aatech.com.tw
Logo AAT - Advanced Analog Technology, Inc.

AAT1236 Datasheet(HTML) 4 Page - Advanced Analog Technology, Inc.

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AAT1236
High Efficiency White LED Drivers
for Backlight and Keypad
4
1236.2007.02.1.1
Electrical Characteristics1
VIN = 3.6V; CIN = 2.2µF;TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = 25°C.
Symbol
Description
Conditions
Min
Typ
Max Units
Power Supply
VIN
Input Voltage Range
2.7
5.5
V
VOUT(MAX)
Maximum Output Voltage
24
V
VIN Rising
2.7
V
VUVLO
UVLO Threshold
Hysteresis
150
mV
VIN Falling
1.8
V
B1 = B2 = A1 = A2 = A3 = 1.2V,
ICC
Operating Current (No Switching)
2mA Setting, RSET = 226kΩ
300
µA
ISHDN(MAX)
VIN Pin Shutdown Current
EN = GND
1.0
µA
IOX
Maximum Continuous Output Current
VO = 24V
100
mA
IDX
Current Sink Accuracy
RSET = 22.6kΩ
18
20
22
mA
IDX-Matching
Current Matching Between Any
RSET = 22.6kΩ,
25
%
Sink Channels
A1 = A2 = A3 = B1 = B2 = 0.4V
VOV
OVP Threshold Voltage
VOUT Rising
1.1
1.2
1.3
V
OVP Threshold Hysteresis
100
mV
RDS(ON)N
Low Side Switch On Resistance
IOUT = 100mA
80
m
Ω
RDS(ON)IN
Input Disconnect Switch
IOUT = 100mA
200
m
Ω
TSS
Soft-Start Time
From Enable to Output
300
µs
Regulation; VFB = 300mV
ISET
Current Set Ratio
ISINK/IRSET, VRSET = 0.6V
760
A/A
ILIMIT
Input Switch Current Limit
1.2
A
Enable Input – EN
VEN(L)
Enable Threshold Low
0.4
V
VEN(H)
Enable Threshold High
1.4
V
I2C Serial Interface – SCL, SDA
FSCL
Clock Frequency
400
kHz
TLOW
Clock Low Period
1.3
µs
THIGH
Clock High Period
0.6
µs
THD_STA
Hold Time START Condition
0.6
µs
TSU_STA
Setup Time for Repeat START
0.6
µs
TSU_DAT
Data Setup Time
100
ns
THD_DAT
Data Hold Low
0
0.9
µs
TSU_STO
Setup Time for STOP Condition
0.6
µs
TBUF
Bus Free Time Between STOP
1.3
µs
and START Condition
VIL
Input Threshold Low
2.7
≤ VIN ≤ 5.5
0.4
V
VIH
Input Threshold High
2.7
≤ VIN ≤ 5.5
1.4
V
II
Input Current
-1.0
1.0
µA
VOL
Output Logic Low (SDA)
IPULLUP = 3mA
0.4
V
1. The AAT1236 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured
by design, characterization, and correlation with statistical process controls.


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