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Preliminary Datasheet

Boost Type LED Driver with 12-Channel Current Source AP3612

Aug. 2012 Rev. 1. 1 BCD Semiconductor Manufacturing Limited

1

General Description

The AP3612 is a high efficiency boost controller with

12-string current sources for driving WLED backlight.

It operates over a wide input voltage range from 4.5V

to 33V.

The current of 12 strings are simply programmed

from 20mA to 75mA with an external resistor. The

current matching between each string is 1.5% (Typ).

Its operating frequency can be adjusted from 0.1MHz

to 1MHz.

The AP3612 features Cycle-by-cycle Current Limit,

Soft Start, Under Voltage Lock Out (UVLO)

protection, programmable OVP, Over Temperature

Protection (OTP), open/short LED protection, V

OUT

short protection and Schottky diode short-circuit

protection.

The AP3612 is available in HSOP-28 and SOIC-24

packages.

Features

• Input Voltage Range: 4.5V to 33V

• Drives up to 12 Strings in Parallel, 75mA per

String

• Programmable WLED Current from 20mA to

75mA

• Adjustable Operating Frequency: 100kHz to

1MHz

• String-to-string Current Matching Accuracy:

1.5%

• Built-in OCP, OTP, UVLO

• External PWM Dimming

• Open/Short LED Protection

• Programmable Soft Start

• Programmable OVP

• Schottky Diode/Inductor Short-circuit Protection

• V

OUT

Short/Schottky Diode Open Protection

Applications

• LCD Monitor

• LCD Display Module

• LCD TV

Figure 1. Package Types of AP3612

HSOP-28 SOIC-24

1 2 3 4 5 6 ... 17 18

Inhaltsverzeichnis

Seite 1

Preliminary Datasheet Boost Type LED Driver with 12-Channel Current Source AP3612 Aug. 2

Seite 2

Preliminary Datasheet Boost Type LED Driver with 12-Channel Current Source AP3612 Aug. 2

Seite 3 - HSOP-28 SOIC-24

Preliminary Datasheet Boost Type LED Driver with 12-Channel Current Source AP3612 Aug. 2

Seite 4

Preliminary Datasheet Boost Type LED Driver with 12-Channel Current Source AP3612 Aug. 2

Seite 5 - Ordering Information

Preliminary Datasheet Boost Type LED Driver with 12-Channel Current Source AP3612 Aug. 2

Seite 6 - Parameter Symbol Value Unit

Preliminary Datasheet Boost Type LED Driver with 12-Channel Current Source AP3612 Aug. 2

Seite 7 - Electrical Characteristics

Preliminary Datasheet Boost Type LED Driver with 12-Channel Current Source AP3612 Aug. 2

Seite 8

Preliminary Datasheet Boost Type LED Driver with 12-Channel Current Source AP3612 Aug. 2

Seite 9 - Frequency (kHz)

Preliminary Datasheet Boost Type LED Driver with 12-Channel Current Source AP3612 Aug. 2

Seite 10

IMPORTANT NOTICE BCD Semiconductor Manufacturing Limited reserves the

Seite 11

Preliminary Datasheet Boost Type LED Driver with 12-Channel Current Source AP3612 Aug. 2

Seite 12

Preliminary Datasheet Boost Type LED Driver with 12-Channel Current Source AP3612 Aug. 2

Seite 13 - Application Information

Preliminary Datasheet Boost Type LED Driver with 12-Channel Current Source AP3612 Aug. 2

Seite 14

Preliminary Datasheet Boost Type LED Driver with 12-Channel Current Source AP3612 Aug. 2

Seite 15 - Typical Application

Preliminary Datasheet Boost Type LED Driver with 12-Channel Current Source AP3612 Aug. 2

Seite 16

Preliminary Datasheet Boost Type LED Driver with 12-Channel Current Source AP3612 Aug. 2

Seite 17

Preliminary Datasheet Boost Type LED Driver with 12-Channel Current Source AP3612 Aug. 2

Seite 18

Preliminary Datasheet Boost Type LED Driver with 12-Channel Current Source AP3612 Aug. 2

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