Global Mixed-mode Technology
AT1316A
High Efficiency, Constant Current 20V White-
LEDs Driver
Feature
Operating Voltage: 2.5V to 5.5V.
High Operating Frequency: 1MHz
High Output Voltage: Up to 20V(Typ.)
Digital Dimming Control.
Built-in Cycle-by Cycle Current-Limiting.
Built-in Soft-Start Function.
0.1V/0.2V/0.3V Low Reference Voltage
Thermal Overload Protection
TSOT-23-6 Package
Description
The AT1316A step-up converter drives white LEDs with a
constant current to provide backlight in cell phones, PDAs,
and other hand-held devices. It features allowing series
connection of the white LEDs so that the LED currents are
identical for uniform brightness. An enable input can be
pulsed repeatedly to adjust LED’s brightness. The fast 1.0
MHz current-mode PWM control allows for smaller
capacitor and inductor. Fault condition protection uses
cycle-by-cycle current limiting to sense maximum inductor
current, thermal protection and over-voltage protection.
Also included soft-start eliminates inrush current during
start-up. The low reference voltage minimized the power
loss across the current-setting resistor.
The AT1316A is available in TSOT-23-6 packages.
Application
GPS Navigation System
Compact Back Light Module
Constant Current Source
LED Module
Ordering Information
ORDER
NUMBER
AT1316A-01TP1U
AT1316A-02TP1U
AT1316A-03TP1U
Note: TP : TSOT-23-6
1 : Bonding Code
U: Tape & Reel
MARKING
3A01x
3A02x
3A03x
VOLTAGE
0.1V
0.2V
0.3V
TEMP.
RANGE
-40°C to 85°C
-40°C to 85°C
-40°C to 85°C
PACKAGE
(Green)
TSOT-23-6
TSOT-23-6
TSOT-23-6
Pin Configuration
Typical Application Circuit
※
Use the tantalum capacitor to eliminate inductor noise on
output terminal when you want to control dimming function.
AT1316A
LX
1
6
VIN
AT1316A
GND
2
5
OVP
FB
3
4
EN
TSOT-23-6
Ver: 0.7
Mar 08, 2012
TEL: 886-3-5788833
http://www.gmt.com.tw
1
FPGA/CPLD
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