®
TOP209/210
TOPSwitch
Family
Three-terminal Off-line PWM Switch
Product Highlights
Cost Effective Switcher for Low Power Applications
• Replaces linear power supplies
• Replaces discrete switcher and 20 to 50 components
– cuts cost, increases reliability
• Stand-by power supplies for Green or energy efficient
products such as personal computers, monitors, UPS,
copiers, fax machines, etc.
• Housekeeping or "keep-alive" power supply applications
such as TV, appliances, industrial control and personal
computers
• Meets 'Blue Angel' low power stand-by specification
• Controlled MOSFET turn-on reduces EMI and EMI filter
costs
• 80% smaller and lighter compared to linear supply
• 50% smaller compared to discrete switcher
Over 80% Efficiency in Flyback Topology
• Built-in start-up and current limit reduce DC losses
• Low capacitance 700 V MOSFET cuts AC losses
• CMOS controller/gate driver consumes only 6 mW
• 70% maximum duty cycle minimizes conduction losses
Simplifies Design – Reduces Time to Market
• Supported by reference design boards
• Integrated PWM Controller and 700 V MOSFET in
industry standard eight pin DIP package
• Only one external capacitor needed for compensation,
bypass and start-up/auto-restart functions
• Easily interfaces with both opto and primary feedback
System Level Fault Protection Features
• Auto-restart and cycle by cycle current limiting functions
handle both primary and secondary faults
• On-chip thermal shutdown with hysteresis protects the
entire system against overload
®
+
Wide-Range
DC Input
TOPSwitch
-
D
CONTROL
C
S
PI-2043-052397
Figure 1. Typical Application.
TOPSwitch
Selection Guide
ORDER
PART
NUMBER
OUTPUT POWER RANGE
PACKAGE
230 VAC or
110 VAC
w/Doubler
85-265
VAC
TOP209P
TOP209G
TOP210PFI
TOP210G
DIP-8
SMD-8
DIP-8
SMD-8
0-4 W
0-2 W
0-8 W
0-5 W
Description
The TOP209/210 implements all functions necessary for an
off-line switched mode control system: high voltage N-channel
power MOSFET with controlled turn-on gate driver, voltage
mode PWM controller with integrated oscillator, high voltage
start-up bias circuit, bandgap derived reference, bias shunt
regulator/error amplifier for loop compensation and fault
protection circuitry. Compared to discrete MOSFET and
controller or self oscillating (RCC) switching converter
solutions, a
TOPSwitch
integrated circuit can reduce total cost,
component count, size, weight and at the same time increase
efficiency and system reliability. The TOP209/210 are intended
for 100/110/230 VAC off-line Power Supply applications in
the 0 to 8 W (0 to 5 W universal) range.
August 1997
POWERINT [ POWER INTEGRATIONS, INC. ]
