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IS32BL3552

Part Number	IS32BL3552
Manufacturer	ISSI
Description	BOOST TYPE LED DRIVER
Published	Jan 13, 2015
Detailed Description	IS32BL3552 BOOST TYPE LED DRIVER WITH 2-CHANNEL CURRENT SOURCE Preliminary Information August 2014 GENERAL DESCRIPTIO...
Datasheet	IS32BL3552 PDF File

Overview

IS32BL3552 BOOST TYPE LED DRIVER WITH 2-CHANNEL CURRENT SOURCE Preliminary Information August 2014 GENERAL DESCRIPTION The IS32BL3552 is a white LED driver for backlight applications based on a highly efficient boost controller operating over a wide input voltage range of 4.
5V to 33V.
The IS32BL3552 contains four regulated current sources with 1.
5% (Typ.
) current matching between strings for a uniform LED brightness.
Each current source can be programmed via an external resistor to drive from 40mA to 360mA.
A fast slew rate current source allows high frequency and narrow pulse width dimming signals to achieve a very high contrast ratio.
The device operating frequency can be adjusted from 0.
1MHz to 1MHz.
The IS32BL3552 has safety protection features to prevent damage during fault conditions.
Protection features include an internal soft-start circuit to prevent a high inrush current during startup, open/short LED protection to automatically disable a faulty current source, over temperature protection (OTP), cycle-by-cycle current limit, under voltage lockout (UVLO), programmable OVP, VOUT short / Schottky diode open protection and Schottky Diode short-circuit protection.
The IS32BL3552 is available in a thermally enhanced eTSSOP-16 package.
FEATURES  Input voltage range: 4.
5V to 33V  2-Channel LED current sinks, 360mA per string  LED current adjustable from 40mA to 360mA  String-to-string current matching accuracy: 1.
5%  Adjustable operating frequency: 100kHz to 1MHz  External PWM dimming  High contrast ratio  Less than 3µA shutdown current  Programmable soft-start  Built-in protection features • OCP, OTP, UVLO • Open/short LED protection • Programmable OVP • Schottky Diode/inductor short-circuit protection  Automotive AEC-Q100 Qualified APPLICATIONS  Automotive Lighting  LCD Monitor/TV  LCD Display Module TYPICAL APPLICATION CIRCUIT Figure 1 Typical Application Circuit Integrated Silicon Solution, Inc.
– www.
issi.
com Rev.
0B, 07/30/2014 1 IS32BL...

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