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TOP222Y Datasheet Download - Power Integrations Inc.

Номер произв TOP222Y
Описание Three-terminal Off-line PWM Switch
Производители Power Integrations Inc.
логотип Power Integrations  Inc. логотип 



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TOP222Y Даташит, Описание, Даташиты
TOP221-227
TOPSwitch-®II Family
Three-terminal Off-line PWM Switch
®
Product Highlights
Lowest cost, lowest component count switcher solution
Cost competitive with linears above 5W
Very low AC/DC losses up to 90% efficiency
Built-in Auto-restart and Current limiting
Latching Thermal shutdown for system level protection
Implements Flyback, Forward, Boost or Buck topology
Works with primary or opto feedback
Stable in discontinuous or continuous conduction mode
Source connected tab for low EMI
Circuit simplicity and Design Tools reduce time to market
Description
The second generation TOPSwitch-II family is more cost
effective and provides several enhancements over the first
generation TOPSwitchfamily. TheTOPSwitch-II family extends
the power range from 100W to 150W for 100/115/230 VAC
input and from 50W to 90W for 85-265 VAC universal input.
This brings TOPSwitch technology advantages to many new
applications, i.e. TV, Monitor, Audio amplifiers, etc. Many
significant circuit enhancements that reduce the sensitivity to
board layout and line transients now make the design even
AC
IN
D
TOPSwitch
CONTROL
C
S
Figure 1. Typical Flyback Application.
PI-1951-091996
easier. The standard 8L PDIP package option reduces cost in
lower power, high efficiency applications. The internal lead
frame of this package uses six of its pins to transfer heat from
the chip directly to the board, eliminating the cost of a heat sink.
TOPSwitch incorporates all functions necessary for a switched
mode control system into a three terminal monolithic IC: power
MOSFET, PWM controller, high voltage start up circuit, loop
compensation and fault protection circuitry.
OUTPUT POWER TABLE
TO-220 (Y) Package1
PART Single Voltage Input3
ORDER 100/115/230 VAC ±15%
NUMBER
P 4,6
MAX
Wide Range Input
85 to 265 VAC
P 4,6
MAX
TOP221Y
12 W
7W
8L PDIP (P) or 8L SMD (G) Package2
PART
ORDER
NUMBER
Single Voltage. Input3
100/115/230 VAC ±15%
P 5,6
MAX
Wide Range Input
85 to 265 VAC
P 5,6
MAX
TOP221P or TOP221G
9W
6W
TOP222Y
25 W
15 W
TOP222P or TOP222G
15 W
10 W
TOP223Y
50 W
30 W
TOP223P or TOP223G
25 W
15 W
TOP224Y
75 W
45 W
TOP224P or TOP224G
30 W
20 W
TOP225Y
100 W
60 W
TOP226Y
125 W
75 W
TOP227Y
150 W
90 W
Notes: 1. Package outline: TO-220/3 2. Package Outline: DIP-8 or SMD-8 3. 100/115 VAC with doubler input 4. Assumes appropriate
heat sinking to keep the maximum TOPSwitch junction temperature below 100 °C. 5. Soldered to 1 sq. in.( 6.45 cm2), 2 oz. copper clad
(610 gm/m2) 6. PMAX is the maximum practical continuous power output level for conditions shown. The continuous power capability
in a given application depends on thermal environment, transformer design, efficiency required, minimum specified input voltage, input
storage capacitance, etc. 7. Refer to key application considerations section when using TOPSwitch-II in an existing TOPSwitch design.
July 2001







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TOP222Y Даташит, Описание, Даташиты
TOP221-227
CONTROL
VC
ZC
SHUNT REGULATOR/
ERROR AMPLIFIER
-
+ 5.7 V
5.7 V
4.7 V
0
1
SHUTDOWN/
AUTO-RESTART
+
-
INTERNAL
SUPPLY
÷8
IFB
OSCILLATOR
DMAX
CLOCK
SAW
RE
THERMAL
SHUTDOWN
POWER-UP
RESET
SQ
RQ
-
+
PWM
COMPARATOR
SQ
RQ
DRAIN
+
- VILIMIT
CONTROLLED
TURN-ON
GATE
DRIVER
LEADING
EDGE
BLANKING
MINIMUM
ON-TIME
DELAY
SOURCE
Figure 2. Functional Block Diagram.
Pin Functional Description
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
connection point for the supply bypass and auto-restart/
compensation capacitor.
SOURCE Pin:
Y package Output MOSFET source connection for high
voltage power return. Primary side circuit
common and reference point.
P and G package Primary side control circuit common and
reference point.
SOURCE (HV RTN) Pin: (P and G package only)
Output MOSFET source connection for high voltage power return.
2D
7/01
PI-1935-091696
Tab Internally
Connected to SOURCE Pin
Y Package (TO-220/3)
DRAIN
SOURCE
CONTROL
SOURCE 1
8 SOURCE (HV RTN)
SOURCE 2
7 SOURCE (HV RTN)
SOURCE 3
6 SOURCE (HV RTN)
CONTROL 4
5 DRAIN
P Package (DIP-8)
G Package (SMD-8)
PI-2084-040401
Figure 3. Pin Configuration.







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TOP222Y Даташит, Описание, Даташиты
TOP221-227
TOPSwitch-II 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 process
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
During normal operation, the duty cycle of the internal output
MOSFET decreases linearly 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 to Figure 6 for
timing and voltage waveforms of the TOPSwitch integrated
circuit.
DMIN
ICD1 2.0
6.0
IC (mA)
PI-2040-050197
Figure 4. Relationship of Duty Cycle to CONTROL Pin Current.
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
0
Off Off
Off
Switching
(b)
Switching
CT is the total external capacitance
connected to the CONTROL pin
Figure 5. Start-up Waveforms for (a) Normal Operation and (b) Auto-restart.
PI-1956-092496
3D
7/01










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