Datasheet > ADM8845ACPZ-WP2

ADM8845ACPZ-WP2

更新时间： 2022-04-23 23:00:11

品牌	Logo	应用领域
亚德诺 - ADI		驱动器泵
页数	文件大小	规格书
20页	372K
描述
Charge Pump Driver for LCD White LED Backlights

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ADM8845ACPZ-WP2 数据手册

ADM8845

PIN CONFIGURATION AND FUNCTION DESCRIPTION

PIN 1

INDICATOR

12 CTRL2

11 C2–

OUT

C2+

ADM8845

TOP VIEW

(Not to Scale)

10 GND

SET

FB1

9 FB6

Figure 2. Pin Configuration

Table 3. Pin Function Descriptions

Pin No. Mnemonic Function

V_OUT

Charge Pump Output. A 2.2 µF capacitor to ground is required on this pin. Connect V_OUTto the anodes of all

the LEDs.

C2+

I_SET

Flying Capacitor 2 Positive Connection.

Bias Current Set Input. The current flowing through R_SET, I_SET, is gained up by 120 to give the I_LEDcurrent.

Connect R_SETto GND to set the bias current as V_SET/R_SET. Note that V_SET= 1.18 V.

4–9

FB1–FB6

LED1–LED6 Cathode Connection and Charge Pump Feedback. The current flowing in these LEDs is 120 times

the current flowing through R_SET, I_SET. When using fewer than six LEDs, this pin can be left unconnected or

connected to GND.

GND

C2−

CTRL2

CTRL1

C1−

V_CC

Device Ground Pin.

Flying Capacitor 2 Negative Connection.

Digital Input. 3 V CMOS Logic. Used with CTRL1 to control the shutdown operation of the main and sub LEDs.

Digital Input. 3 V CMOS Logic. Used with CTRL2 to control the shutdown operation of the main and sub LEDs.

Flying Capacitor 1 Negative Connection.

Positive Supply Voltage Input. Connect this pin to a 2.6 V to 5.5 V supply with a 4.7 µF decoupling capacitor.

Flying Capacitor 1 Positive Connection.

C1+

Expose Paddle. Connect the exposed paddle to GND.

Rev. 0 | Page 5 of 20

1 2 3 456 7 8...20

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