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PWM Switch. TOP209P Datasheet

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PWM Switch. TOP209P Datasheet






TOP209P Switch. Datasheet pdf. Equivalent




TOP209P Switch. Datasheet pdf. Equivalent





Part

TOP209P

Description

Three-terminal Off-line PWM Switch



Feature


® TOP209/210 TOPSwitch Family Three-te rminal Off-line PWM Switch Product High lights Cost Effective Switcher for Low Power Applications • Replaces linear power supplies • Replaces discrete sw itcher and 20 to 50 components – cuts cost, increases reliability • Stand- by power supplies for Green or energy e fficient products such as personal comp uters, monitors, UPS, copie.
Manufacture

Power Integrations Inc.

Datasheet
Download TOP209P Datasheet


Power Integrations  Inc. TOP209P

TOP209P; rs, fax machines, etc. • Housekeeping or "keep-alive" power supply applicatio ns such as TV, appliances, industrial c ontrol and personal computers • Meets 'Blue Angel' low power stand-by specif ication • Controlled MOSFET turn-on r educes EMI and EMI filter costs • 80% smaller and lighter compared to linear supply • 50% smaller compared to dis crete switcher Over 80% Effi.


Power Integrations  Inc. TOP209P

ciency in Flyback Topology • Built-in start-up and current limit reduce DC lo sses • Low capacitance 700 V MOSFET c uts AC losses • CMOS controller/gate driver consumes only 6 mW • 70% maxim um duty cycle minimizes conduction loss es Simplifies Design – Reduces Time t o Market • Supported by reference des ign boards • Integrated PWM Controlle r and 700 V MOSFET in industry s.


Power Integrations  Inc. TOP209P

tandard eight pin DIP package • Only o ne external capacitor needed for compen sation, bypass and start-up/auto-restar t functions • Easily interfaces with both opto and primary feedback System L evel Fault Protection Features • Auto -restart and cycle by cycle current lim iting functions handle both primary and secondary faults • On-chip thermal s hutdown with hysteresis pr.

Part

TOP209P

Description

Three-terminal Off-line PWM Switch



Feature


® TOP209/210 TOPSwitch Family Three-te rminal Off-line PWM Switch Product High lights Cost Effective Switcher for Low Power Applications • Replaces linear power supplies • Replaces discrete sw itcher and 20 to 50 components – cuts cost, increases reliability • Stand- by power supplies for Green or energy e fficient products such as personal comp uters, monitors, UPS, copie.
Manufacture

Power Integrations Inc.

Datasheet
Download TOP209P Datasheet




 TOP209P
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
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
+
Wide-Range
DC Input
D
TOPSwitch
CONTROL
C
-S
Figure 1. Typical Application.
PI-2043-052397
TOPSwitch Selection Guide
ORDER
PART
NUMBER
OUTPUT POWER RANGE
PACKAGE
230 VAC or
110 VAC
w/Doubler
85-265
VAC
TOP209P
TOP209G
DIP-8
SMD-8
0-4 W
0-2 W
TOP210PFI
TOP210G
DIP-8
SMD-8
0-8 W
0-5 W
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




 TOP209P
TOP209/210
CONTROL
VC
ZC
SHUNT REGULATOR/
ERROR AMPLIFIER
-
+ 5.7 V
5.7 V
4.7 V
0
1
SHUTDOWN/
AUTO-RESTART
+
-
POWER-UP
RESET
INTERNAL
SUPPLY
÷8
IFB
OSCILLATOR
DMAX
CLOCK
SAW
RE
THERMAL
SHUTDOWN
WITH
HYSTERESIS
-
+
PWM
COMPARATOR
SQ
RQ
Figure 2. Functional Block Diagram.
DRAIN
+
- VILIMIT
CONTROLLED
TURN-ON
GATE
DRIVER
LEADING
EDGE
BLANKING
MINIMUM
ON-TIME
DELAY
SOURCE
PI-1742-011796
Pin Functional Description
2 DRAIN Pin:
Output MOSFET drain connection. Provides internal bias
current during start-up operation via an internal switched high-
voltage current source. Internal current sense point.
CONTROL Pin:
Error amplifier and feedback current input pin for duty cycle
control. Internal shunt regulator connection to provide internal
bias current during normal operation. It is also used as the
supply bypass and auto-restart/compensation capacitor
connection point.
SOURCE Pin:
Control circuit common, internally connected to output
MOSFET source.
SOURCE (HV RTN) Pin:
Output MOSFET source connection for high voltage return.
SOURCE 1
8 SOURCE (HV RTN)
N/C 2
N/C 3
7 N/C
6 N/C
CONTROL 4
5 DRAIN
P Package (DIP-8)
G Package (SMD-8)
Figure 3. Pin Configuration.
PI—2044-040901
2A
8/97




 TOP209P
TOP209/210
TOPSwitch Family Functional Description
TOPSwitch is a self biased and protected
linear control current-to-duty cycle
converter with an open drain output.
High efficiency is achieved through the
use of CMOS and integration of the
maximum number of functions possible.
CMOS significantly reduces bias
currents as compared to bipolar or
discrete solutions. Integration eliminates
external power resistors used for current
sensing and/or supplying initial start-up
bias current.
Auto-restart
DMAX
IB
Slope = PWM Gain
-16%/mA
During normal operation, the internal
output MOSFET duty cycle linearly
decreases with increasing CONTROL
pin current as shown in Figure 4. To
implement all the required control, bias,
and protection functions, the DRAIN
and CONTROL pins each perform
several functions as described below.
Refer to Figure 2 for a block diagram
and Figure 6 for timing and voltage
waveforms of the TOPSwitch integrated
circuit.
Control Voltage Supply
CONTROL pin voltage VC is the supply
or bias voltage for the controller and
driver circuitry. An external bypass
capacitor closely connected between the
CONTROL and SOURCE pins is
required to supply the gate drive current.
The total amount of capacitance
connected to this pin (CT) also sets the
auto-restart timing as well as control
loop compensation. VC is regulated in
either of two modes of operation.
Hysteretic regulation is used for initial
start-up and overload operation. Shunt
regulation is used to separate the duty
cycle error signal from the control circuit
supply current. During start-up, VC
current is supplied from a high-voltage
switched current source connected
internally between the DRAIN and
CONTROL pins. The current source
provides sufficient current to supply the
control circuitry as well as charge the
total external capacitance (CT).
DMIN
ICD1 2.5
6.5
IC (mA)
Figure 4. Relationship of Duty Cycle to CONTROL Pin Current.
PI-2047-060497
5.7 V
4.7 V
VC
0
IC
Charging CT
DRAIN VIN
0
Off
5.7 V
VC 4.7 V
0
IC
Charging CT
Switching
(a)
ICD1
Discharging CT
ICD2
Discharging CT
8 Cycles
95%
5%
DRAIN VIN
Off
Off
Off
0
Switching
Switching
(b)
CT is the total external capacitance
connected to the CONTROL pin
PI-1124A-060694
Figure 5. Start-up Waveforms for (a) Normal Operation and (b) Auto-restart.
3A
8/97



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