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PT4201 Datasheet Preview

PT4201 Datasheet

Current-mode PWM Controller

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PT4201
Current-mode PWM Controller
GENERAL DESCRIPTION
PT4201 is a highly integrated current mode PWM
controllerproviding low standby power and cost
effective system solution for the sub 30W flyback
converter applications. It is also suitable for high
precision and high reliable LED lighting applications.
It features power saving operation at no load or light
load condition, PWM frequency is reduced to minimize
switching loss and low standby power and high
efficiency is thus achieved. PT4201 also features low
VDD startup current which also contributes to low
standby power. The built in LEB on the current sense
input removes the signal glitch due to snubber circuit
diode reverse recovery thus reduce the external
component count and system cost in the design.
Rich protection is implemented in PT4201 including
cycle-by-cycle current limiting (OCP), over load
protection (OLP), VDD over voltage clamp and under
voltage lockout (UVLO). Gate drive output is clamped
at 18V to protect the power MOSFET. By limiting the
minimum frequency above 22 kHz eliminates the
potential audible noise when the system works under
light or no load conditions.
Excellent EMI performance is achieved with
C.R.PowTech proprietary frequency Jittering technique
together with soft driving control at totem pole gate
drive output.
The PT4201 is available in SOT23-6, SOP-8 and DIP-8
packages.
FEATURES
z Frequency Jittering for Improved EMI
Performance
z Green-Mode PWM for Improved Efficiency and
Minimum standby power design
z Low start up current 20uA ( Typ. 3uA) and Low
operation current 2mA (Typ. 1mA)
z Current mode operation
z Leading-edge blanking on current sense input
z Programmable PWM frequency
z Constant output power limit for universal AC
input
z Built-in power limit control (OLP)
z Cycle-by-cycle current limiting (OCP)
z Under voltage lockout (UVLO)
z GATE output maximum voltage clamped at 18V
z Totem pole output includes soft driving for
better EMI
APPLICATIONS
Offline AC/DC flyback converter for
z Power Adapter
z Open-frame SMPS
z Battery Charger Adapter
z 1W-30W HB LED lighting.
ORDERING INFORMATION
PACKAGE
SOT23-6, Pb free
DIP8, Pb free
SOP8, Pb free
Note:
TEMPERATURE
RANGE
-40to 85
-40to 85
-40to 85
ORDERING PART
NUMBER
PT4201E23F
PT4201EDIH
PT4201ESOH
TRANSPORT
MEDIA
Tape and Reel
Tube
Tape and Reel
MARKING
4201
PT4201
xxxxxX
PT4201
xxxxxX
xxxxxX
Assembly Factory Code
Lot Number
PT4201_DS Rev EN_2.0
www.micro-bridge.com
Page 1




PowTech

PT4201 Datasheet Preview

PT4201 Datasheet

Current-mode PWM Controller

No Preview Available !

PT4201
Current-mode PWM Controller
TYPICAL APPLICATIONS (Switching Power Supply)
TYPICAL APPLICATIONS (HB LED Lighting)
PIN ASSIGNMENT
PT4201_DS Rev EN_2.0
www.micro-bridge.com
Page 2


Part Number PT4201
Description Current-mode PWM Controller
Maker PowTech
PDF Download

PT4201 Datasheet PDF






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