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TOP209G の電気的特性と機能

TOP209GのメーカーはPower Integrations Inc.です、この部品の機能は「Three-terminal Off-line PWM Switch」です。


製品の詳細 ( Datasheet PDF )

部品番号 TOP209G
部品説明 Three-terminal Off-line PWM Switch
メーカ Power Integrations Inc.
ロゴ Power Integrations  Inc. ロゴ 




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TOP209G Datasheet, TOP209G PDF,ピン配置, 機能
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





TOP209G pdf, ピン配列
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


3Pages


TOP209G 電子部品, 半導体
TOP209/210
General Circuit Description
Figure 7 shows a low-cost, DC input, flyback switching power
supply using the TOP210 integrated circuit. This 5 V, 4 W
power supply operates from a DC voltage derived from rectified
and filtered AC mains voltage of 85 to 265 VAC. The 5 V
output is indirectly sensed via the primary bias winding. The
output voltage is determined by the TOPSwitch CONTROL pin
shunt regulator voltage (VC), the voltage drops of rectifiers D2
and D3, and the turns ratio between the bias winding and output
winding of T1. Other output voltages are also possible by
adjusting the transformer turns ratios.
The high voltage DC bus is applied to the primary winding of
T1. Capacitor C1 filters the high voltage supply, and is only
necessary if the connections between the high voltage DC
supply and the TOP210 are long. The other side of the
transformer primary is driven by the integrated high-voltage
MOSFET within the TOP210. D1 and VR1 clamp the voltage
spike caused by transformer leakage inductance to a safe value
and reduce ringing at the DRAIN of U1. The power secondary
winding is rectified and filtered by D2, C2, L1, and C3 to create
the 5V output voltage. The bias winding is rectified and filtered
by D3, R1 and C5 to create a bias voltage to the TOP210. C5
also filters internal MOSFET gate drive charge current spikes
on the CONTROL pin, determines the auto-restart frequency,
and together with R1, compensates the control loop.
D2 L1
1N5822
3.3 µH
1
8
+5 V
+
VR1
BZY97-
C120
120 V
C2
330 µF
10 V
C3
100 µF
10 V
5
D1
RTN
UF4005
D3
1N4148
2
4
DC
INPUT
C1
10 nF
400 V
3
T1
R1
15
2
-
D
TOPSwitch
CONTROL
C
S U1
TOP210
TRD1
C5
47 µF
10 V
CIRCUIT PERFORMANCE:
Line Regulation - 1.5%
(104-370 VDC)
Load Regulation - 5%
(10-100%)
Ripple Voltage 25 mV
Figure 7. Schematic Diagram of a Minimum Parts Count 5 V, 4 W Bias Supply Using the TOP210.
PI-2045-041798
6A
8/97

6 Page



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共有リンク

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部品番号部品説明メーカ
TOP209

Three-terminal Off-line PWM Switch

Power Integrations  Inc.
Power Integrations Inc.
TOP209G

Three-terminal Off-line PWM Switch

Power Integrations  Inc.
Power Integrations Inc.
TOP209P

Three-terminal Off-line PWM Switch

Power Integrations  Inc.
Power Integrations Inc.


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