YB1520

Step-up DC-DC Converter, White LED Driver

YB1520 Rev.1.4

www.yobon.com.tw

2

SW

GND

CTRL

VIN

SOT23-5

5

4

1

2

3

FB

Pin Configuration

Figure 2: Pin Configuration

Pin Description

Table 1

Pin

NAME

Description

1

SW

Switching Pin. This is the collector of the internal NPN power switch.

Connect to inductor and diode. Minimize the metal trace area

connected to this pin to reduce EMI.

2

GND

Ground Pin. Connect directly to local ground plane.

3

FB

Feedback Pin. Reference voltage is 200mV. Connect LEDs and a

resistor at this pin. LED current is determined by the resistance and

CTRL voltage.

4

CTRL

Shutdown Pin and Dimming Control Pin.

VCTRL > 1.8V generates full-scale LED current.

VCTRL < 0.4V chip is off.

Switching from 0.4V to 2.0V, PWM duty cycle controls the LED current.

5

VIN

Input Supply Pin. Bypass this pin with a capacitor as close to the

device as possible.

Ordering Information

Order Number

Package Type

Supplied As

Package Marking

YB1520ST25

SOT23-5

3000 units Tape & Reel

Please contact sales

representative