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MA2201

Major Power Technology Co., Ltd.

Rev 1.2

24

High Voltage, Step-up LED Driving Controller



GENERAL DESCRIPTION

The MA2201 is a current mode step-up LED Driving controller. The input voltage range is

widely from 3.5V to 28V, designed to drive an external N-channel MOSFET. Output LED

The PWM switching frequency is 600KHz and allows usage of small external inductor.

reliability. The controller also provides protection functions such as input under voltage

lock-out, output over voltage protection (only in SOP8L), current limit, and thermal shutdown.



FEATURES

-

3.5V to 28V Operating Input Voltage Range.

-

38V Maximum Output Voltage

-

600KHz Fixed Switching Frequency.

-

0.2V ±2% Feedback Voltage Range.

-

Up to 90% Efficiency.

-

Drives up to 10 WLEDs.

-

External Soft-Start Function.

- Over Current Protection (OCP).

-

Thermal Shutdown Protection (OTP).

-

Input Under Voltage Lock-out (UVLO).

-

Output Over Voltage Protection (OVP, only in SOP8L).

-

Available in SOP8L and SOT23-6L Package Types.



SIMPLIFIED APPLICATION CIRCUIT

1W

WLEDs

C1

10uF

Q1

NMOS

C3

0.1uF

R2

10K

Ω

D1

SS34

L1

10uH

U1

1

7

2

8

5

3

6

4

SS

EN

VIN

SENSE

GND

GATE

R1

220K

Ω

FB

0.05

Ω

OVP

C2

10uF

1.3

Ω