A8530EESTR-T

A8530EESTR-T Datasheet

A8530

Part	Datasheet
A8530EESTR-T	A8530EESTR-T (pdf)

PDF Datasheet Preview
A8530 Ultracompact 6-Channel Backlight and Flash/Torch White LED Driver Proprietary adaptive control scheme 1x, 2x typical LED current matching 2 separate serial interfaces for dimming control Drives up to 6 white LEDs 4 display backlight, 2 flash/torch 30 mA per LED channel for display backlight 100 mA per LED channel for flash/torch backlight 320 mA total output current capability Low EMI design and soft-start function Short circuit, overvoltage, thermal shutdown protection mm very thin profile, 3 mm x 3 mm package Package 16 pin QFN/MLP suffix ES The A8530 high efficiency charge pump ICs offer a simple, low-cost white LED driver solution for driving four display backlight and two flash/torch/video mode white LEDs. Using a proprietary control scheme 1x, and 2x , the A8530 can deliver well-matched LED current while maintaining the highest efficiency and low EMI. The LED current is regulated over the entire range of Li+ battery voltage to provide uniform intensity. LED brightness and on/off can be controlled for 4 display backlight LEDs and 2 flash/torch LEDs through 2 single-wire serial interface pins. The A8530 is available in a very thin profile mm nominal height 3 mmx 3 mm QFN/MLP 16 pin package. Applications include: White LED backlights for cellular phones, PDAs Digital cameras, camcorders Other portable device white LED backlighting 320 mA WLED flash/torch Approximate Scale 1:1 VBATT to V CIN µF C1 1 µF C2 1 µF RSET On/Off and Dimming Control VOUT COUT µF D1 LED1 LED2 C2+ A8530 LED3 LED4 ISET LED5 ENF GND LED6 D1-D4 Backlight D5-D6 Flash Figure 4 x 30 mA backlight with 2 x 100 mA flash VBATT to V CIN µF C1 1 µF C2 1 µF RSET On/Off and Dimming Control VOUT COUT µF D1 LED1 LED2 C2+ A8530 LED3 ISET LED4 Use the following complete part number when ordering: Packaging* A8530EESTR-T 7-in. reel, 1500 pieces/reel *Contact Allegro for additional packing options. Package Type ES, 3 x 3 mm MLP-16 Allegro MicroSystems, Inc. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 508 853-5000 A8530 Ultracompact 6-Channel Backlight and Flash/Torch White LED Driver Pin-out Diagram ES Package 16 C1+ 15 14 VIN 13 C2+ 1 VOUT 2 ISET 3 ENF 4 12 GND 11 LED1 EP 10 LED2 9 LED3 ENM 5 LED6 6 LED5 7 LED4 8 Top View Terminal List Table Name C1+ C2+ ENF ENM EP GND ISET LED1, LED2, LED3, and LED4 LED5 and LED6 VOUT Number 13 16 15 1 4 5 12 8, 9, 10, and 11 6 and 7 Function Negative terminal of capacitor C1. Connect capacitor C1 between C1+ and Positive terminal of capacitor C1. Negative terminal of capacitor C2 Positive terminal of capacitor C2. Connect capacitor C2 between C2+ and Enable and dimming control input for flash/torch. Enable and dimming control input for display backlight. Exposed metal pad on bottom side. Connect this to ground plane for better thermal performance. Ground. Connect RSET resistor to ground to set desired constant current through backlight LEDs. ILED max = 220 x V / RSET Current sink for display backlight LEDs. If not used, connect to VOUT, but do not leave open. If left open, the IC works in 2 x mode. Current sink for flash/torch LEDs. If not used, connect to VOUT, but do not leave open. If left open, the IC works in 2 x mode. Power supply voltage input. Charge pump output voltage source for display backlight and flash/torch LED anodes. Connect a uF capacitor, COUT, between VOUT and GND see figures 1 through Allegro MicroSystems, Inc. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 508 853-5000 A8530 Ultracompact 6-Channel Backlight and Flash/Torch White LED Driver ELECTRICAL CHARACTERISTICSa VIN = ENM = V, ENF = GND, C1 = C2 = 1 uF, CIN = COUT = uF, RSET = kΩ, TA = to +85°C typical values are at TA = 25°C unless otherwise noted Characteristics Test Conditions

PDF Datasheet Preview

A8530

Ultracompact 6-Channel Backlight and Flash/Torch White LED Driver

Proprietary adaptive control scheme 1x, 2x typical LED current matching 2 separate serial interfaces for dimming control Drives up to 6 white LEDs 4 display backlight, 2 flash/torch 30 mA per LED channel for display backlight 100 mA per LED channel for flash/torch backlight 320 mA total output current capability Low EMI design and soft-start function Short circuit, overvoltage, thermal shutdown protection mm very thin profile, 3 mm x 3 mm package

Package 16 pin QFN/MLP suffix ES

The A8530 high efficiency charge pump ICs offer a simple, low-cost white LED driver solution for driving four display backlight and two flash/torch/video mode white LEDs. Using a proprietary control scheme 1x, and 2x , the A8530 can deliver well-matched LED current while maintaining the highest efficiency and low EMI. The LED current is regulated over the entire range of Li+ battery voltage to provide uniform intensity.

LED brightness and on/off can be controlled for 4 display backlight LEDs and 2 flash/torch LEDs through 2 single-wire serial interface pins.

The A8530 is available in a very thin profile mm nominal height 3 mmx 3 mm QFN/MLP 16 pin package. Applications include:

White LED backlights for cellular phones, PDAs Digital cameras, camcorders Other portable device white LED backlighting 320 mA WLED flash/torch

Approximate Scale 1:1

VBATT to V

CIN µF

C1 1 µF

C2 1 µF

RSET

On/Off and Dimming Control

VOUT

COUT µF

D1 LED1

LED2

C2+ A8530

LED3

LED4

ISET

LED5

ENF GND LED6

D1-D4 Backlight D5-D6 Flash

Figure 4 x 30 mA backlight with 2 x 100 mA flash

VBATT to V

CIN µF

C1 1 µF

C2 1 µF

RSET

On/Off and Dimming Control

VOUT

COUT µF

D1 LED1

LED2

C2+ A8530

LED3

ISET

LED4
Use the following complete part number when ordering:

Packaging*

A8530EESTR-T
7-in. reel, 1500 pieces/reel
*Contact Allegro for additional packing options.

Package Type ES, 3 x 3 mm MLP-16

Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036

Worcester, Massachusetts 01615-0036 508 853-5000

A8530

Ultracompact 6-Channel Backlight and Flash/Torch White LED Driver

Pin-out Diagram

ES Package
16 C1+ 15 14 VIN 13

C2+ 1 VOUT 2

ISET 3 ENF 4
12 GND
11 LED1 EP
10 LED2
9 LED3

ENM 5 LED6 6 LED5 7 LED4 8

Top View

Terminal List Table

Name C1+ C2+ ENF ENM EP GND

ISET

LED1, LED2, LED3, and LED4

LED5 and LED6

VOUT

Number 13 16 15 1 4 5 12
8, 9, 10, and 11
6 and 7

Function Negative terminal of capacitor C1. Connect capacitor C1 between C1+ and Positive terminal of capacitor C1. Negative terminal of capacitor C2 Positive terminal of capacitor C2. Connect capacitor C2 between C2+ and Enable and dimming control input for flash/torch. Enable and dimming control input for display backlight. Exposed metal pad on bottom side. Connect this to ground plane for better thermal performance. Ground. Connect RSET resistor to ground to set desired constant current through backlight LEDs. ILED max = 220 x V / RSET Current sink for display backlight LEDs. If not used, connect to VOUT, but do not leave open. If left open, the IC works in 2 x mode. Current sink for flash/torch LEDs. If not used, connect to VOUT, but do not leave open. If left open, the IC works in 2 x mode. Power supply voltage input. Charge pump output voltage source for display backlight and flash/torch LED anodes. Connect a uF capacitor, COUT, between VOUT and GND see figures 1 through

Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036

Worcester, Massachusetts 01615-0036 508 853-5000

A8530

Ultracompact 6-Channel Backlight and Flash/Torch White LED Driver

ELECTRICAL CHARACTERISTICSa VIN = ENM = V, ENF = GND, C1 = C2 = 1 uF, CIN = COUT = uF, RSET = kΩ,

TA = to +85°C typical values are at TA = 25°C unless otherwise noted

Characteristics

Test Conditions

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Datasheet ID: A8530EESTR-T 516085