IS32BL3552-ZLA3 Datasheet IS32BL3552-ZLA3-TR, IS32BL3552-ZLA3 | P1-P3

IS32BL3552

Integrated Silicon Solution, Inc. – www.issi.com 1

Rev. A, 07/20/2015

BOOST TYPE LED DRIVER WITH 2-CHANNEL CURRENT SOURCE

August 2015

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

IS32BL3552

Integrated Silicon Solution, Inc. – www.issi.com 2

Rev. A, 07/20/2015

PIN CONFIGURATION

Package Pin Configuration (Top View)

eTSSOP-16

PIN DESCRIPTION

No. Pin Description

1 RT A resistor value to ground sets the switching frequency from 100kHz to 1MHz.

2 EN

Enable Input. The IC is Enabled when this pin is above 2.4V. The IC is Disabled

and in Shutdown mode when this pin is below 0.5V. In shutdown mode only a

minimal 3µA current is consumed.

3 CS

Current sense input from the switching converter. A sense resistor from the

source of the external N-MOSFET to GND sets the switching current limit.

4 OUT

Switching N-MOSFET Gate Drive Output. This pin outputs a high voltage

(5V/V

-0.5V) to drive an external switching N-MOSFET.

5 VCC

5V linear regulator output. Bypass this pin to GND with a ceramic capacitor as

close as possible to the pin.

6 VIN

Supply input (4.5V to 33V). Bypass VIN to GND with a capacitor (typical 10µF)

to keep the DC input voltage constant.

7 STATUS LED operation status will output logic low if a fault is detected.

8 COMP Soft-start and control loop compensation.

9 DIM

PWM signal input for LED dimming. If dimming is not implemented, connect it

to VCC pin 5.

10 CH1 LED current sink 1 (up to 360mA). If unused leave the pin open unconnected.

11,14 NC No connection.

13 CH2 LED current sink 2 (up to 360mA). If unused leave the pin open unconnected.

12 GND Ground. Connect all grounds at a single point.

15 ISET

LED current adjust input. Connect a resistor R

ISET

between ISET pin and GND

to set the reference current through each LED string.

16 OVP

Over voltage protection pin. Connect a resistor-divider from the switching

converter output to this pin. The OVP comparator reference is internally set to

2.0V. Above 2.0V triggers OVP and shuts down switch power; switch resumes

normal operation when the pin voltage drops below hysteresis voltage.

Thermal Pad Connect to GND.

IS32BL3552

Integrated Silicon Solution, Inc. – www.issi.com 3

Rev. A, 07/20/2015

ORDERING INFORMATION

Automotive Range: -40°C to +125°C

Order Part No. Package QTY

IS32BL3552-ZLA3-TR

IS32BL3552-ZLA3

eTSSOP-16, Lead-free

2500/Reel

96/Tube

timewithoutnotice.ISSIassumesnoliabilityarisingoutoftheapplicationoruseofanyinformation,productsorservicesdescribedherein.Customersare

advisedto

obtainthelatestversionofthisdevicespecificationbeforerelyingonanypublishedinformationandbeforeplacingordersforproducts.

IntegratedSiliconSolution,Inc.doesnotrecommendtheuseofanyofitsproductsinlifesupportapplicationswherethefailureormalfunctionofthe

productcanreasonablybeexpected

tocausefailureofthelifesupportsystemortosignificantlyaffectitssafetyoreffectiveness.Productsarenot

authorizedforuseinsuchapplicationsunlessIntegratedSiliconSolution,Inc.receiveswrittenassurancetoitssatisfaction,that:

a.)theriskofinjuryordamagehasbeenminimized;

b.)theuserassume

allsuchrisks;and

c.)potentialliabilityofIntegratedSiliconSolution,Incisadequatelyprotectedunderthecircumstances

P1-P3 P4-P6 P7-P9 P10-P12 P13-P15 P16-P16

IS32BL3552-ZLA3

Mfr. #:

Buy IS32BL3552-ZLA3

Manufacturer:

ISSI

Description:

LED Lighting Drivers Boost type LEDdriver 2-Channel e-TSSOP16

Lifecycle:

New from this manufacturer.

Delivery:

DHL FedEx Ups TNT EMS

Payment:

T/T Paypal Visa MoneyGram Western Union

IS32BL3552-ZLA3

IS32BL3552-ZLA3

Products related to this Datasheet