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PDF TOP209P Data sheet ( Hoja de datos )
| Número de pieza | TOP209P | |
| Descripción | Three-terminal Off-line PWM Switch | |
| Fabricantes | Power Integrations Inc. | |
| Logotipo |  |
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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
1 page  
TOP209/210
VIN
VIN
DRAIN
0
VOUT
0
IOUT
0
VC
0
IC 0
1
12
812
81
••• •••
12
812
81
••• •••
21
Figure 6. Typical Waveforms for (1) Normal Operation, (2) Auto-restart.
PI-1742-011796
Shutdown/Auto-restart
To minimize TOPSwitch power dissipation, the shutdown/
auto-restart circuit turns the power supply on and off at a duty
cycle of typically 5% if an out of regulation condition persists.
Loss of regulation interrupts the external current into the
CONTROL pin. VCregulation changes from shunt mode to the
hysteretic auto-restart mode described above. When the fault
condition is removed, the power supply output becomes
regulated, VC regulation returns to shunt mode, and normal
operation of the power supply resumes.
Hysteretic Overtemperature Protection
Temperature protection is provided by a precision analog
circuit that turns the output MOSFET off when the junction
temperature exceeds the thermal shutdown temperature
(typically 145 °C). When the junction temperature cools past
the hysteresis temperature, normal operation resumes. V is
C
regulated in hysteretic mode while the power supply is turned
off.
High-voltage Bias Current Source
This current source biases TOPSwitch from the DRAIN pin and
charges the CONTROL pin external capacitance (CT) during
start-up or hysteretic operation. The current source is switched
on and off with an effective duty cycle of approximately 35%.
This duty cycle is determined by the ratio of CONTROL pin
charge (I ) and discharge currents (I and I ). This current
C CD1 CD2
source is turned off during normal operation when the output
MOSFET is switching.
5A
8/97
5 Page 
TOP209/210
Parameter
OUTPUT
ON-State
Resistance
OFF-State
Current
Breakdown
Voltage
Symbol
Conditions
(Unless Otherwise Specified)
See Figure 12
SOURCE = 0 V
TJ = -40 to 125 °C
Min
RDS(ON)
IDSS
BVDSS
I = 25 mA
D
TJ = 25 °C
TJ = 100 °C
See Note B
VDS = 560 V, TA = 125 °C
See Note B, ID = 100 µA, TA = 25 °C 700
Rise
Time
Fall
Time
tR Measured
in a Typical
t Flyback Converter Application
F
DRAIN Supply
Voltage
See Note C
36
SUPPLY
Shunt Regulator
Voltage
Shunt Regulator
Temperature Drift
V
C(SHUNT)
I = 4 mA
C
5.5
Typ Max
31.2 36.0
51.4 59.4
250
100
50
5.8 6.1
±50
Units
Ω
µA
V
ns
ns
V
V
ppm/°C
CONTROL Supply/
Discharge Current
ICD1
ICD2
Output MOSFET Enabled
Output MOSFET Disabled
0.6 1.2 1.6
0.5 0.8 1.1
mA
NOTES:
A. For specifications with negative values, a negative temperature coefficient corresponds to an increase in magnitude
with increasing temperature, and a positive temperature coefficient corresponds to a decrease in magnitude with
increasing temperature.
B. The breakdown & leakage measurements can be accomplished by using the TOPSwitch auto-restart feature. The
divide-by-8 counter in the auto-restart circuitry disables the output MOSFET from switching in 7 out of 8 cycles. To
place the TOPSwitch in one of these cycles, the following procedure can be carried out using the modified circuit of
Figure 12:
11A
8/97
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet TOP209P.PDF ] | |
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