鈩?/div>
/100A, made using VIPower M0
Technology, combines on the same silicon chip a
state-of-the-art PWM circuit together with an
optimized high voltage avalanche rugged Vertical
Power MOSFET (620V or 700V / 3A).
Typical applications cover off line power supplies
with a secondary power capability of 50 W in wide
range condition and 100W in single range or with
doubler configuration. It is compatible from both
primary or secondary regulation loop despite
using around 50% less components when
compared with a discrete solution. Burst mode
operation is an additional feature of this device,
offering the possibility to operate in stand-by
mode without extra components.
BLOCK DIAGRAM
OSC
DRAIN
ON/OFF
OSCILLATOR
SECURITY
LATCH
V
DD
PWM
LATCH
S
R1 FF Q
R2 R3
UVLO
LOGIC
R/S
FF
S
Q
OVERTEMP.
DETECTOR
0.5V
_
+ +
_
0.5 V
ERROR
_ AMPLIFIER
13 V
+
+
_
1.7
碌
s
DELAY
250 ns
BLANKING
1 V/A
CURRENT
AMPLIFIER
COMP
SOURCE
May 2003
FC00231
4.5 V
1/23
1