ld7552 Leadtrend Technology, ld7552 Datasheet - Page 3

• Manufacturer Part Number: ld7552
• Description: Green-mode Pwm Controller
• Manufacturer: Leadtrend Technology

Block Diagram
Absolute Maximum Ratings
Supply Voltage VCC
COMP, RT, CS
Operating Junction Temperature
Storage Temperature Range
Package thermal resistance (DIP-8)
Package thermal resistance (SOP-8)
Lead temperature (LD7552IS & LD7552IN, Soldering, 10sec)
Lead temperature (LD7552BS & LD7552BN, Soldering, 10sec)
Caution:
Stresses beyond the ratings specified in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only
rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not
implied.
Leadtrend Technology Corporation
LD7552-DS-00 February, 2005
COMP
RT
CS
Green-Mode
Oscillator
OSC
40V
Blanking
Leading
Edge
16.0V/
11.4V
EN
2R
UVLO
R
+
Vref OK
∑
internal bias
3
+
& Vref
VCC
GND
PWM
Comparator
Ramp from
Oscillator
S
R
EN
36V
-0.3 ~7V
150°C
-65°C to 150°C
100°C/W
160°C/W
230°C
260°C
Q
OUT
LD7552