ADD5207 データシートの表示（PDF） - Analog Devices

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ADD5207

Four-String, White LED Driver for LCD Backlight Applications

Analog Devices 

ADD5207

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

VIN 1

FSLCT 2

ISET 3

FB1 4

FB2 5

FB3 6

FB4 7

ADD5207

14 SW

13 OVP

12 GND

11 COMP

10 SHDN

9 PWM

8 VDD

TOP VIEW

(Not to Scale)

NOTES

1. CONNECT THE EXPOSED PADDLE

TO GROUND.

Figure 3. Pin Configuration

Data Sheet

Table 6. Pin Function Descriptions

Pin No. Mnemonic Description

1

VIN

Supply Input. Must be locally bypassed with a capacitor to ground.

2

FSLCT

Frequency Select. A resistor from this pin to ground sets the boost switching frequency from 600 kHz to 1 MHz.

3

ISET

Full-Scale LED Current Set. A resistor from this pin to ground sets the LED current up to 25 mA.

4

FB1

Regulated Current Sink. Connect the bottom cathode of the LED string to this pin.

5

FB2

Regulated Current Sink. Connect the bottom cathode of the LED string to this pin.

6

FB3

Regulated Current Sink. Connect the bottom cathode of the LED string to this pin.

7

FB4

Regulated Current Sink. Connect the bottom cathode of the LED string to this pin. If unused, connect FB4 to GND.

8

VDD

Internal Linear Regulator Output. This regulator provides power to the ADD5207.

9

PWM

PWM Signal Input.

10

SHDN

Shutdown Control for PWM Input Operation Mode. Active low.

11

COMP

Compensation for the Boost Converter. Two capacitors and a resistor are connected in series between ground and

this pin for stable operation.

12

GND

Ground.

13

OVP

Overvoltage Protection. The boost converter output is connected to this pin directly.

14

SW

Drain Connection of the Internal Power FET.

EP

Exposed Paddle. Connect the exposed paddle to ground.

Rev. A | Page 8 of 16

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