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LED DRIVER. IS31BL3231 Datasheet

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LED DRIVER. IS31BL3231 Datasheet






IS31BL3231 DRIVER. Datasheet pdf. Equivalent




IS31BL3231 DRIVER. Datasheet pdf. Equivalent





Part

IS31BL3231

Description

FLASH LED DRIVER



Feature


IS31BL3231 FLASH LED DRIVER July 2015 GENERAL DESCRIPTION The IS31BL3231 is a current-regulated charge pump and idea l for powering high brightness LEDs for camera flash and torch applications. T he charge pump can be set to regulate t wo current levels for FLASH and TORCH m odes. The IS31BL3231 automatically swit ches between linear and boost modes ens uring that LED cur.
Manufacture

ISSI

Datasheet
Download IS31BL3231 Datasheet


ISSI IS31BL3231

IS31BL3231; rent does not depend on the LED forward voltage. IS31BL3231 provides low cost, space saving solution for driving LED. It also integrates thermal and short ci rcuit protection function. IS31BL3231 i s available in DFN-10 (3mm × 3mm). It operates from 2.7V to 5.5V over the tem perature range of -40°C to +85°C. FE ATURES Operates from 2.7V to 5.5V Up to 90% efficiency in .


ISSI IS31BL3231

Torch Mode Output current up to 750mA Adjustable output current in Flash Mode Minimum external components, no exter nal inductor required Automatic boost mode Less than 1µA shutdown current Low ripple and EMI Over voltage protec tion on output Short and over temperat ure protections Available in DFN-10 (3 mm × 3mm) package APPLICATIONS White LED backlighting C.


ISSI IS31BL3231

ellular phones Generic lighting/flash/s trobe applications TYPICAL APPLICATION CIRCUIT Figure 1 Typical Application Circuit (Torch Mode Lv1-227mA, Flash Mo de 718mA) Integrated Silicon Solution, Inc. – www.issi.com Rev. C, 06/12/20 15 1 IS31BL3231 Figure 2 Typical Appl ication Circuit (Torch Mode Lv1-50mA, F lash Mode 518mA) Integrated Silicon So lution, Inc. – www.i.

Part

IS31BL3231

Description

FLASH LED DRIVER



Feature


IS31BL3231 FLASH LED DRIVER July 2015 GENERAL DESCRIPTION The IS31BL3231 is a current-regulated charge pump and idea l for powering high brightness LEDs for camera flash and torch applications. T he charge pump can be set to regulate t wo current levels for FLASH and TORCH m odes. The IS31BL3231 automatically swit ches between linear and boost modes ens uring that LED cur.
Manufacture

ISSI

Datasheet
Download IS31BL3231 Datasheet




 IS31BL3231
IS31BL3231
FLASH LED DRIVER
July 2015
GENERAL DESCRIPTION
The IS31BL3231 is a current-regulated charge pump
and ideal for powering high brightness LEDs for camera
flash and torch applications. The charge pump can be
set to regulate two current levels for FLASH and TORCH
modes. The IS31BL3231 automatically switches
between linear and boost modes ensuring that LED
current does not depend on the LED forward voltage.
IS31BL3231 provides low cost, space saving solution for
driving LED. It also integrates thermal and short circuit
protection function.
IS31BL3231 is available in DFN-10 (3mm × 3mm). It
operates from 2.7V to 5.5V over the temperature range
of -40°C to +85°C.
FEATURES
Operates from 2.7V to 5.5V
Up to 90% efficiency in Torch Mode
Output current up to 750mA
Adjustable output current in Flash Mode
Minimum external components, no external
inductor required
Automatic boost mode
Less than 1µA shutdown current
Low ripple and EMI
Over voltage protection on output
Short and over temperature protections
Available in DFN-10 (3mm × 3mm) package
APPLICATIONS
White LED backlighting
Cellular phones
Generic lighting/flash/strobe applications
TYPICAL APPLICATION CIRCUIT
Figure 1 Typical Application Circuit (Torch Mode Lv1-227mA, Flash Mode 718mA)
Integrated Silicon Solution, Inc. – www.issi.com
Rev. C, 06/12/2015
1




 IS31BL3231
IS31BL3231
Figure 2 Typical Application Circuit (Torch Mode Lv1-50mA, Flash Mode 518mA)
Integrated Silicon Solution, Inc. – www.issi.com
Rev. C, 06/12/2015
2




 IS31BL3231
IS31BL3231
PIN CONFIGURATION
Package
Pin Configuration (Top View)
DFN-10
PIN DESCRIPTION
No. Pin
1 VCC
2 CP
3 CN
4 FLASH
5 EN
6 RSET
7 FB
8 SGND
9 PGND
10 VOUT
Thermal Pad
Description
Power supply.
Positive input for external flying cap.
Negative input for external flying cap.
Input pin to toggle operation between Flash Mode and
Torch Mode.
Shutdown control input and Torch reference select pin.
The intensity can be modulated by PWM signal via EN
pin. It is recommended to use 100Hz and 5%~95% duty
cycle PWM signal.
Set the FB voltage in Flash Mode.
VFB 1.25V / RSET 11.2k
Feedback input for the current control loop.
I LED VFB / RFB
Internal ground pin.
Power ground pin.
Charge pump output voltage.
Connect to GND.
Integrated Silicon Solution, Inc. – www.issi.com
Rev. C, 06/12/2015
3



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