(Preliminary) MG39U301
Universal PWM Type LED Driver
Contents
1
2
3
4
5
6
7
8
9
10
Features.......................................................................................................... 2
Description ...................................................................................................... 2
Order Information ............................................................................................ 2
Application Field.............................................................................................. 2
Pin Description ................................................................................................ 3
5.1
5.2
Pin Definition .................................................................................................................... 3
Pin Configuration.............................................................................................................. 3
Block Diagram................................................................................................. 4
Application Circuit ........................................................................................... 4
Absolute Maximum Rating .............................................................................. 5
Electrical Characteristics................................................................................. 6
Package Dimension ........................................................................................ 8
10.1
10.2
SOP8 Package Dimension............................................................................................... 8
SOP16 Package Dimension............................................................................................. 9
11 Revision History ............................................................................................ 10
This document contains information on a new product under development by Megawin. Megawin reserves the right to change or
discontinue this product without notice.
©
Megawin Technology Co., Ltd. 2012 All rights reserved.
2012/10 version 1.02
1 Features
Operation voltage, 7.5V ~ 500V
Provide constant frequency or constant off-time control
Open loop current peak detector
Linear or PWM dimming control
2 Description
The MG39U301 is a current feedback control, buck type LED driver IC. It achieves good output current regulation
without the need of external compensation components.
The MG39U301 integrates a HV start-up circuit, 7.5V ~ 500V linear regulator, precision comparator, PWM control
and ring oscillator into one chip. With those building circuits, a precision current output buck mode converter with
dimming control (linear or PWM type) can be easily achieved with only few external components. The linear
dimming control input is 0~0.25V & the PWM dimming range is 0~100% duty at a frequency of up to 10KHz.
The chip is available in 8-pin or 16-pin SOP package.
3 Order Information
MG39U301ASC1
Package
SOP8
MG39U301ASC2
SOP16
4 Application Field
DC-DC or AC-DC LED driver application
Backlighting LED driver
General-purpose constant current source
2
MG39U301 Data Sheet
MEGAWIN
5 Pin Description
5.1 Pin Definition
SOP8
1
2
3
4
5
6
7
SOP16
1
4
5
8
9
12
13
Pin Name
VIN
CS
GND
GATE
PWM
VDD
LD
7.5~500V high voltage input.
Current sense input pin.
Ground pin.
Driver for external power MOS.
PWM dimming input.
Regulated core supply.
Linear dimming input. If current sense threshold is required less than
0.25V, an external voltage can be applied to this pin.
Ring oscillator bias input. When RT is connected to ground via a resistor,
the MG39U301 operates in constant frequency mode. When the resistor
is connected between RT & GATE, the MG39U301 operates in constant
off-time mode.
Description
8
14
RT
-
2, 3,
6, 7,
10, 11,
15, 16
NC
No connection.
5.2 Pin Configuration
1
VIN
8
RT
VIN
2
LD
6
NC
3
NC
14
RT
15
NC
1
16
NC
MG39U301
2
CS
3
GND
4
GATE
7
VDD
MG39U301
5
PWM
CS
4
13
LD
12
VDD
11
NC
10
NC
8-pin SOP with
Thermal Pad
5
GND
6
NC
7
NC
8
GATE
9
PWM
16-pin SOP with
Thermal Pad
MEGAWIN
MG39U301 Data Sheet
3
6 Block Diagram
Regulator
ULVO
VIN
VDD
RST
POR
LD
-
+
CS
+
0.25V
Blanking
R
S
Q
GATE
PWM
-
Oscillator
GND
RT
7 Application Circuit
Buck Driver Example 1
Constant Frequency
V
INDC
10uF/400V
R
VIN
R
OSC
8
7
6
5
PWM
VDD
RT
MG39U301
GATE
GND
VIN
CS
1
2
LD
V
LED
3
4
R
CS
4
MG39U301 Data Sheet
MEGAWIN
Buck Driver Example 2
Constant Off-time
V
INDC
10uF/400V
R
VIN
8
7
6
5
PWM
VDD
R
OSC
RT
MG39U301
GATE
GND
VIN
CS
1
2
LD
V
LED
3
4
R
CS
8 Absolute Maximum Rating
Parameter
VIN to GND
VDD to GND
CS, LD, PWM, GATE, RT to GND
Junction Temperature
Storage temperature
Rating
-0.5 to +525
7
-0.3 to (V
DD
+ 0.3)
-40 to +125
-55 to +155
Unit
V
V
V
°C
°C
Note: Exposure to conditions beyond those listed under Absolute Maximum Ratings may adversely affect the life and reliability of the device.
MEGAWIN
MG39U301 Data Sheet
5
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
