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LD7536RM Datasheet Preview

LD7536RM Datasheet

Green-Mode PWM Controller

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LD7536RM
11/3/2010
Green-Mode PWM Controller with Frequency Swapping
and Integrated Protections
Rev. 00
General Description
The LD7536RM is built-in with several functions,
protection and EMI-improved solution in a tiny package. It
takes less components counts or circuit space, especially
ideal for those total solutions of low cost.
The implemented functions include low startup current,
green-mode power-saving operation, leading-edge
blanking of the current sensing and internal slope
compensation. It also features more protections like
OLP (Over Load Protection) and OVP (Over Voltage
Protection) to prevent circuit damage occurred under
abnormal conditions.
Furthermore, the Frequency Swapping function is to
reduce the noise level and thus helps the power circuit
designers to easily deal with the EMI filter design by
spending minimum amount of component cost and
developing time.
Features
z High-Voltage CMOS Process with Excellent ESD
protection
z Very Low Startup Current (<20μA)
z Current Mode Control
z Green Mode Control
z UVLO (Under Voltage Lockout)
z LEB (Leading-Edge Blanking) on CS Pin
z Internal Frequency Swapping
z Internal Slope Compensation
z OVP (Over Voltage Protection) on Vcc Pin
z OTP (Over Temperature Protection) through a NTC
z OLP (Over Load Protection)
z 300mA Driving Capability
Applications
z Switching AC/DC Adaptor and Battery Charger
z Open Frame Switching Power Supply
Typical Application
Leadtrend Technology Corporation
LD7536RM-DS-00 Nov. 2010
1
www.leadtrend.com.tw




Leadtrend

LD7536RM Datasheet Preview

LD7536RM Datasheet

Green-Mode PWM Controller

No Preview Available !

Pin Configuration
DIP-8 (TOP VIEW)
8765
TOP MARK
YYWWPP
1 23 4
LD7536RM
SOT-26 (TOP VIEW)
OUT VCC CS
654
3 6R
YW1 PP
1 23
GND COMP OTP
Ordering Information
YY, Y : Year code (D: 2004, E: 2005…..)
WW, W : Week code
PP : Production code
136R : LD7536RM
Part number
LD7536RM GL
LD7536RM GN
Package
SOT-26
Green Package
DIP-8
Green Package
Top Mark
YW1/36R
LD7536RMGN
Shipping
3000 /tape & reel
3600 /tube /Carton
Protection Mode
Switching Freq.
65kHz
VCC OVP
Auto recovery
OLP
Auto recovery/ 65ms
OTP Pin
Latch
Pin Descriptions
SOT-26
1
DIP-8
8
27
35
44
52
61
NAME
GND
COMP
OTP
CS
VCC
OUT
FUNCTION
Ground
Voltage feedback pin (same as the COMP pin in UC384X). Connect
a photo-coupler to close the control loop and achieve the regulation.
Pull this pin below 0.95V to shutdown the controller into latch mode
until the AC resume power-on. Connecting this pin to ground with
NTC will achieve OTP protection. Keep this pin float to disable the
latch protection.
Current sense pin, connect it to sense the MOSFET current
Supply voltage pin
Gate drive output to drive the external MOSFET
Leadtrend Technology Corporation
LD7536RM-DS-00 Nov. 2010
2
www.leadtrend.com.tw


Part Number LD7536RM
Description Green-Mode PWM Controller
Maker Leadtrend
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LD7536RM Datasheet PDF






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