Datasheet > 驱动程序和接口 > 显示驱动器> ADP1655ACBZ-R7

ADP1655ACBZ-R7

更新时间： 2024-02-09 18:43:44

品牌	Logo	应用领域
亚德诺 - ADI		显示驱动器驱动程序和接口接口集成电路闪光灯
页数	文件大小	规格书
24页	664K
描述
Dual LED Flash Driver with I2C-Compatible Interface

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技术参数
数据手册

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ADP1655ACBZ-R7 技术参数

是否无铅：	含铅	是否Rohs认证：	符合
生命周期：	Active	零件包装代码：	BGA
包装说明：	VFBGA, BGA12,3X4,20	针数：	12
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.72
Is Samacsys：	N	数据输入模式：	SERIAL
接口集成电路类型：	LED DISPLAY DRIVER	JESD-30 代码：	R-PBGA-B12
JESD-609代码：	e1	长度：	2 mm
复用显示功能：	NO	功能数量：	1
区段数：	2	端子数量：	12
最高工作温度：	125 °C	最低工作温度：	-40 °C
封装主体材料：	PLASTIC/EPOXY	封装代码：	VFBGA
封装等效代码：	BGA12,3X4,20	封装形状：	RECTANGULAR
封装形式：	GRID ARRAY, VERY THIN PROFILE, FINE PITCH	峰值回流温度（摄氏度）：	260
电源：	3.6 V	认证状态：	Not Qualified
座面最大高度：	0.66 mm	子类别：	Display Drivers
最大供电电压：	5.5 V	最小供电电压：	2.7 V
标称供电电压：	3.6 V	表面贴装：	YES
温度等级：	AUTOMOTIVE	端子面层：	TIN SILVER COPPER
端子形式：	BALL	端子节距：	0.5 mm
端子位置：	BOTTOM	处于峰值回流温度下的最长时间：	40
宽度：	1.5 mm	最小 fmax：	0.4 MHz
Base Number Matches：	1

ADP1655ACBZ-R7 数据手册

ADP1655

SAFETY FEATURES

For critical system conditions, such as output overvoltage,

flash timeout, LED output short circuit, and overtemperature

conditions, the ADP1655 has built-in safety mechanisms. If

one of the fault conditions occurs, the device shuts down and

a corresponding flag is set in the fault information register

(Register 0x05). In I²C interface mode, the system baseband

processor can read the fault information register through the

I²C interface to determine the nature of the fault condition

and, consequently, the fault flag is cleared. The device is

disabled until the fault information register is cleared.

OVERTEMPERATURE FAULT

If the junction temperature of the ADP1655 rises above 150°C,

a thermal protection circuit shuts down the device. In I²C mode,

Bit 5 of the fault information register is read back as high. The

ADP1655 is disabled until the fault is cleared.

SHORT-CIRCUIT FAULT

The LED_OUT pin features short-circuit protection that

disables the ADP1655 if it detects a short circuit to ground at

the LED_OUT pin. The ADP1655 monitors the LED voltage

when the LED driver is enabled. If the LED_OUT pin remains

below the short-circuit detection threshold during startup, a

short circuit is detected. Bit 6 of the fault information register

is read back as high. The ADP1655 is disabled until the fault is

cleared.

In 2-bit logic interface mode, the I²C register readback is not

available. To clear a fault, set EN1, EN2, and TORCH low.

OVERVOLTAGE FAULT

The ADP1655 contains a comparator at the VOUT pin that

monitors the voltage between VOUT and SGND. If the voltage

exceeds 9.5 V (typical), the ADP1655 shuts down. In I²C mode,

Bit 7 in the fault information register is read back as high. The

ADP1655 is disabled until the fault is cleared, ensuring protec-

tion against an open circuit.

CURRENT LIMIT

The internal switch limits battery current by ensuring that the

peak inductor current does not exceed the programmed limit

(current limit is set by Bit 6 and Bit 7 in the output mode register,

the part shuts down and Bit 1 of the fault information register

is read back as high. The ADP1655 is disabled until the fault is

cleared.

OUTPUT CAPACITOR FAULT

If no output capacitor is present at the VOUT pin when the

ADP1655 is enabled for a flash, torch, or assist light event,

the part shuts down and Bit 7 in the fault information register

is read back as high. The ADP1655 is disabled until the fault is

cleared. The output capacitor detection scheme does not cause

the VOUT pin to rise above the overvoltage threshold even though

the overvoltage flag (Bit 7) in the fault information register

(Register 5) is set. The overvoltage and output capacitor fault

flags share a single register bit to reduce the required number

of registers.

AMOUNT OF LED DETECTION

The ADP1655 is able to detect the amount of LED connected in

series between the LED_OUT pin and the PGND potential. In

I²C mode, the detection is enabled with Bit 3 in the output mode

detect the LED forward voltage (Vf) with a voltage comparator

at the start of a flash, torch, or assist light event. If the detected

forward voltage is higher than 4.3 V (typical), Bit 3 of the fault

information register is read back as high.

TIMEOUT FAULT

If the 2-bit logic interface is used, the maximum duration for

flash being enabled (EN1/EN2 = 1) is preset to 850 ms. If EN1

and EN2 remain high for longer than 850 ms, ADP1655 is

disabled until the fault is cleared (EN1, EN2, and TORCH low).

In I²C mode, if strobe mode is enabled (Register 0x04, Bit 2),

strobe is set to level sensitive mode (Register 0x04, Bit 5), and

if strobe remains high for longer than 850 ms, the timeout fault

bit, Register 0x05, Bit 4), is read back as high. The ADP1655 is

disabled until the fault is cleared.

INPUT UNDERVOLTAGE

The ADP1655 includes an input undervoltage lockout circuit. If

the battery voltage drops below the 2.4 V (typical) input UVLO

threshold, the ADP1655 shuts down. In this case, information

in all registers is lost, and when power is reapplied, a power-on

reset circuit resets the registers to their default conditions.

Rev. 0 | Page 19 of 24

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