AP2071AEN datasheet, PDF - EEWORLD Datasheet

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AP2071AEN: DescriptionIC LED DRIVER 24QFN; CategoryAnalog mixed-signal IC Drivers and interfaces; File Size1MB，31 Pages; ManufacturerAKM [Asahi Kasei Microsystems]

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AP2071AEN Overview

IC LED DRIVER 24QFN

AP2071AEN Parametric

Parameter Name	Attribute value
Maker	AKM [Asahi Kasei Microsystems]
package instruction	HVQCCN,
Reach Compliance Code	unknown
ECCN code	EAR99
data entry mode	SERIAL
Interface integrated circuit type	LED DISPLAY DRIVER
JESD-30 code	S-XQCC-N24
length	4 mm
Number of functions	1
Number of segments	4
Number of terminals	24
Maximum operating temperature	85 °C
Minimum operating temperature	-30 °C
Package body material	UNSPECIFIED
encapsulated code	HVQCCN
Package shape	SQUARE
Package form	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
Maximum seat height	0.8 mm
Maximum supply voltage	5.5 V
Minimum supply voltage	2.5 V
Nominal supply voltage	3.7 V
surface mount	YES
Temperature level	OTHER
Terminal form	NO LEAD
Terminal pitch	0.5 mm
Terminal location	QUAD
width	4 mm
minfmax	0.4 MHz

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[AP2071AEN]

AP2071AEN

High Current (8A) white LEDs driver for Flash with I

1. General Description

The AP2071AEN is a white LED driver IC for camera flash, using EDLC (Electronic Double Layer

Capacitor) in portable equipment. The AP2071AEN integrates a current mode synchronous boost DC-DC

converter and four maximum 2A current sources (maximum 8.0A total). The internal boost DC-DC converter

integrates a switching FET and synchronous rectifier, and supporting small size multilayer inductor with

2MHz switching frequency. An integrated EDLC voltage control circuit and a charge current control circuit

makes the AP2071AEN most suitable for EDLC charge systems. The AP2071AEN also includes eight

protections that are an under voltage lock out, EDLC cell short/open protection, thermal detection, LED

open/short detection, LED thermal protection, output-ground short protection, inductor current limitation and

flashing time limitation to avoid significant system problems. Flash current, torch current, charge current,

inductor limit current, flash on-time and EDLC full charge voltage are programmable through I

C interface.

The AP2071AEN is housed in a small size package (24-pin QFN, 4.0mm x 4.0mm) to utilize less board space.

2. Features



Power Supply Voltage(VIN): 2.5V~5.5V



LED Current:

max 8.0A, total (max 2.0A/ch)



High Efficiency:

- 90% @ VIN pin=3.7V, VOUT pin=4.5V, total LED current= 240mA,

Torch mode, with recommended external parts



Switching Frequency:

2.0 MHz



Mode:

- Charge (charge to EDLC)

- Flash

- Torch

- Bypass torch

(Boost circuit off, only drive LEDs with fixed current source)

- Discharge



C Function:

- Flash/Torch LED current setting (Each channel can be set independently)

- Flashing ON-time setting

- Charge current setting

- Current Limit value setting

- Full charge voltage setting (EDLC)

- Discharge finishing voltage setting (EDLC)

- NTC voltage detection voltage setting



Protection Function:

- UVLO (Under Voltage Lock Out) protection

- EDLC cell short/open protection

- Thermal protection

- LED Open/Short protection

- LED thermal protection

- Output-GND protection

- Inductor current limitation protection

- Flashing time limitation protection



Ta:

-30 to 85C



Package:

24-pinUQFN (4.0 x 4.0mm, 0.5mm pitch)

MS1607-E-00

-1-

2014/03

[AP2071AEN]

3. Table of Contents

General Description ....................................................................................................................................1

Features .......................................................................................................................................................1

Table of Contents ........................................................................................................................................2

Block Diagram ............................................................................................................................................3

Pin Configurations and Functions ...............................................................................................................4

■

Ordering Guide ..........................................................................................................................................4

■

Pin Configurations .....................................................................................................................................4

■

PIN Functions ............................................................................................................................................4

6. Absolute Maximum Ratings .......................................................................................................................5

7. Recommended Operating Conditions .........................................................................................................5

8. Electrical Characteristics ............................................................................................................................6

■

Input Logic Characteristics ........................................................................................................................7

■

Timing Diagram .........................................................................................................................................7

9. Functional Descriptions ..............................................................................................................................8

■

Charging Sequence ....................................................................................................................................9

■

Flashing Sequence ...................................................................................................................................10

■

Torching Sequence ..................................................................................................................................11

■

Bypass Torching Sequence ......................................................................................................................14

■

Discharging Sequence .............................................................................................................................15

■

Protection Function..................................................................................................................................16

■

LED Temperature Detection Function ....................................................................................................17

■

Typical Performance Characteristics .......................................................................................................18

■

Serial Control Interface ...........................................................................................................................20

10. Register Map .........................................................................................................................................23

11. Recommended External Circuits ...........................................................................................................28

■

Recommended Parts ................................................................................................................................28

12. Package ..................................................................................................................................................29

■

Outline Dimensions .................................................................................................................................29

■

PCB layout ...............................................................................................................................................29

■

Marking....................................................................................................................................................29

13. Revise History .......................................................................................................................................30

IMPORTANT NOTICE

..............................................................................................................................31

MS1607-E-00

-2-

2014/03

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