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PS6203
PWM Controller of High-performance Current Mode
Product Specification
GENERAL DESCRIPTION
FEATURES
PWM controller of high-performance current mode is
Set-in high-voltage power switch tube of 800V and few
specially designed for AC/DC transformer with high
performance and price ratio, which supplies continuous
peripheral components.
.
With the modulation of lock pulse width, the testing is
according to the pulse limit current.
.
output power of 12W within the range of wide-voltage
With the function of output frequency reduction, the non-
between 85V and 265V, the output power of peak value
output power consumption can be less than 0.3W.
can be up to 15W. The combination of optimized
Inner-built ramp and anti-feedback compensation
function.
.
reasonable circuit design and bipolar facture technology
The independent upper-limit current testing controller
with high performance and price ratio economizes the
deals with over-current and over-load of the controller real-
whole cost ultimately. The power controller can be applied
to the typical fly-back circuit topology so as to form a
timely.
.
The period emission pole is turned off and it outputs by
deflected voltage, and the pressure resistance of the power
simple AC/DC transformer. When the output power is
tube is improved.
lower, IC will reduce the working frequency automatically,
Set-in current limit resistance with temperature.
therefore, the standby power consumption becomes
.
compensation, which makes the current limit precise.
Set-in heat protection circuit.
.
extremely low. When the power tube is closed, the interior
Startup is accomplished with the magnification function
circuit will bias it reversely, utilize the characteristic of high
of the switch power tube, and the power consumption of
pressure resistance CB of bipolar transistor directly, and
improve its pressure resistance capacity to the high
startup resistance is reduced more than10 times.
Few peripheral components.
Low startup and operating current.
voltage of 800V, which ensures the security of the power
VCC over-voltage automatic limit.
tube.
Continuous wide-voltage output power reaches 12W,
.
Meanwhile, the perfect function of overload and
and the output power of peak value arrives at 15W.
saturation prevention is provided inside of IC, which can
keep away some abnormal status, such as overload,
APPLICATIONS
saturation of transformer, and output short circuit, so as to
Adaptor (for example, travel charger, out
improve the reliability of the power supply. The current
power station)
limit and clock frequency can be set up by exterior
Open Frame (such as electromagnetic oven,
components.
.
microwave oven and etc.)
.
.
Now the standard encapsulation and the environmental
protection leadless encapsulation that meets European
standard of DIP8 are supplied .
© Power Source Inc.
.
Confidential
V1.1
PS6203
PWM Controller of High-performance Current Mode
Product Specification
TYPICAL APPLICATION
PS6203
© Power Source Inc.
Confidential
V1.1
PS6203
PWM Controller of High-performance Current Mode
Product Specification
GENERAL INFORMATION
Pin Configuration
Absolute Maximum Ratings
The pin map is shown as below for DIP8.
Parameter
Power supply voltage VCC
16V
Startup input voltage
16V
Pins input voltage
VCC+0.3V
Endurance voltage of OC collector
-0.3-800V
Switching current of peak value
800mA
Total dissipation power
1000mW
Operating temperature range
0—﹢125℃
Deposit temperature range
-55 — +150℃
Welding temperature
PS6203
Value
+260℃,10S
TERMINAL ASSIGNMENTS
Pins
Symbol
Pins Description
Base electrode of power tube, control terminal of start-up current , external startup
resistance
1
OB
2
VCC
Supply electric pins
3
GND
Meet grounding pins
4
CT
Oscillate pins, external timing capacitance
5
FB
Feedback pins
6
IS
Switching current sampling and limit enactment, sampling resistance of external
current
7,8
OC
Output pins, meet switching transformer
MARKING INFORAMTION
PS6203: Product Name
PS6203D
D: DIP with PB-free
L: Lot Number Code
LYWWI
Y: Year Code (0~9)
WW: Week Code (01~52)
I: Internal Code
© Power Source Inc.
Confidential
V1.1
PS6203
PWM Controller of High-performance Current Mode
Product Specification
OUTPUT POWER TABLE
Product
85-264Vac
230Vac±15%
Package
Open Frame
Adapter
Open Frame
Adapter
18W
15W
15W
12W
PS6203
DIP8
Notes:
1. Maximum practical continuous power in an open frame design with sufficient drain pattern as a heat sink, at 50℃
ambient.
BLOCK DIAGRAM
ELECTRICAL CHARACTERISTICS
(TA = 25C, VCC = 5.5-5.7V, Ct=680pF, RS=1ohm , if not otherwise noted)
PARAMETER
Symbol
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Current Sampling Section
Current Sampling Threshold
VCS
0.55
0.60
0.65
V
Anti-Upper Limiting Current
IL
0.25
0.27
0.29
A
60
70
dB
Power Supply Suppression Ratio
© Power Source Inc.
Confidential
V1.1
PS6203
PWM Controller of High-performance Current Mode
Product Specification
ELECTRICAL CHARACTERISTICS
(TA = 25C, VCC = 5.5-5.7V, Ct=680pF, RS=1ohm , if not otherwise noted)
PARAMETER
Symbol
TEST CONDITIONS
MIN
I-OC=10mA
TYPE
MAX
UNIT
800
Output Section
Max withstanding voltage of the switching
tube
V
Saturation voltage
Vsat
I-OC=250mA
1
V
Output Rise time
TR
CL=1nF
75
ns
Output Fall time
TF
CL=1nF
75
ns
Output limiting current
TJ=0—100℃
250
270
290
mA
Io=1.0mA
2.4
2.5
2.6
V
2
20
mV
3
%
Reference Section
Reference Output voltage
VREF
Line Regulation
VCC=6.5—9V
Load Regulation
Io=0.1mA—1.2mA
Temperature stability
0.2
Output noise voltage
F=10HZ—10KHZ
Long Term stability
1000hour@85℃
mV/℃
50
5
uV
mV
Oscillator Section
Oscillating Frequency
F_OSC
KHZ
1
%
Ta=0-85℃
Temperature stability
67
VCC=6.5-9V
Voltage stability
CT=680pF
55
1
%
Oscillator Amplitude (VP-P)
61
2.2
V
Feedback Section
Input
impedance
Pull up Current
FB=2.5V,IS=0
0.55
Pull down Resistor
0.60
0.65
30
Power Supply Suppression Ratio
VCC=6.5-9V
mA
KΩ
60
70
dB
57
61
%
3.5
%
2.4
3.2
mA
55
80
uA
2.8
3.0
3.2
mA
Start up voltage
8.6
8.8
9.0
V
Oscillator turn off voltage
4.4
4.6
4.8
V
Re-enabling voltage
3.6
3.8
4.0
V
Over Voltage limiting Threshold
9.5
10
10.5
V
PWM Section
Maximum Duty Ratio
D_max
Minimum Duty Ratio
53
D_min
Power Supply Current Section
Initiation Reception Current
1.6
Initiation Static Current
Static Current
NOTE:
IQ
VCC=8V
The PS6203 is guaranteed to meet performance specifications from 0℃ to 70℃. Specifications over the -40℃ to 85℃
operating temperature range are assured by design, characterization and correlation with statistical process controls.
© Power Source Inc.
Confidential
V1.1
PS6203
PWM Controller of High-performance Current Mode
Product Specification
OPERATION DESCRIPTION
During start-up phase, the inner-reference voltage is
OB on-current is about 40mA, then OB on-current
closed when electrified; FB pull-up power source is
increases linearly with IS, when IS increases to 0.6V,
closed, the start-up current is input from OB to VCC
OB on-current is about 120mA, this characteristic
through BOOT circuit; when the voltage of VCC goes
makes effective use of the output current of OB,
up to 8.8V, BOOT circuit stop working and not charge
decreases the power consumption of PS6203), if IS
VCC, the start-up phase is ended, and it comes into the
detects that the specified current FB, it will come into
normal phase.
.
the close cycle; during the close cycle, OB pulls down,
During normal phase, VCC voltage shall keep at
the power tube will not shut off immediately, but OE
4.8~9.0V, the inner-reference voltage (VR) is 2.5V
clamps 1.5V (after the power tube is shut off, the base
benchmark; FB pull-up current source starts up; the
will be biased reversely, which improves the voltage
oscillator output OSC1 decides the maximum duty cycle,
endurance); during open or close cycle, if the power
output OSC2 tries to touch off the power supply to enter
tube is detected beyond the upper limit current, the
open cycle to enter the open cycle, and shield flashing
trigger of the upper limit current will be placed
peak current of the power tube ; if FB is less than 1.8V
preferentially and forces FB to drop, the duty cycle will
(about between 1.2-1.8V), the cycle of the oscillator will
become less so as to protect the power tube and
increase with it, the less FB is, the wider the cycle of the
transformer; at the beginning of next close cycle or
oscillator is, until the oscillation stops (This characteristic
when FB is less than 1.8V, the trigger of the upper limit
reduces the standby power consumption of the
current will reset. In addition, PS6203 is installed over
switching power.) ; if the peripheral feedback tries to
h e a t p r o t e c t i o n i n t e r n a l l y, w h e n t h e i n t e r n a l
make VCC more than 9.6V, the in-circuit is fed back to
temperature is higher than 140℃, it will broaden the
FB and makes VCC stabilize the voltage at 9.6V
cycle of the oscillator and makes the temperature of
(According to this Characteristic, we can may not adopt
PS6203 less than 150℃; The ramp compensation is
peripheral feedback circuit, and stabilize the output
also placed internally, when PS6203 is in a big duty
voltage by in-circuit, but the precision of stabilizing
cycle or in the mode of constant current, it can stabilize
voltage is low); During the open cycle, OB supplies base
the open/close cycle.
current for the power tube, OE pulls down the emitter of
If VCC declines to 4.3V or so, the oscillator will shut
the power tube to IS, and OB adopts the driving
off, OSC1 and OSC2 are in the low level, and the
parameter of ramp current ( it refers to that OB on-
power supply keeps at close cycle; when VCC goes on
current is the parameter of IS, when IS is 0V,
declining to 3.7V or so, PS6203 will come into the startup phase once again.
.
.
Normal stage Switching Cycle Oscillogram
Global Oscillogram
© Power Source Inc.
Confidential
V1.1
PS6203
PWM Controller of High-performance Current Mode
Product Specification
Electric Parameter Definitions
Power Supply Design Points
Start-up receives current: The current of OC when
Current control switching power supply with
there’s a 0.5mA pull down current of OB in the start-up
fly-back design, discontinuous current operation mode.
period.
.
The power supply start-up current is 0.5-2mA
Start-up static current:The minimum current
which is alternative. The magnification of power
sourcing current which can enable VCC surging when
transistor Q1 can be supposed as 10. Then the
VCC is connected to a filter capacitor and an adjustable
alternation of the start-up resistance must assure the
current sourcing, CT is connected to a 680pF capacitor,
current of the power transistor’s base is between
and other pins with no connection.
.
0.05mA to 0.2mA. Therefore, the power of the output
Start-up voltage:The maximum of VCC above.
resistance can reduce to 1/10, which reduces the
Re-start-up voltage:The minimum of VCC above.
power in idle state .
Oscillator shut-down voltage:The negative-edge of
In diagram 3, C3=680pF, the maximum operation
VCC above; the value of VCC which can stop the
frequency is about 67KHz .
oscillator.
.
The reference winding rectifier output is 4.8~9.0V
Static current: The VCC power supply current in
(6V is recommended) of the Switching transformer (T1
normal period when FB is connected to the ground by
in diagram 3), which provide operation power for
a 1.0KΩ resistance.
PS6203.
.
.
.
.
Oscillator pull up/pull down current: The pull up/pull
The maximum primary peak current of the
down current of CT when FB=2.5V and CT=1.25V in
switching transformer is 0.6A. When at wide voltage or
normal period.
.
110V Vac , or 85V magnetism dissipation voltage, the
FB pull up current: which occurs in normal period,
maximum output power can achieve more than 12W.
when FB=2.5V, and IS=0A .
.
The OC (Pin 7, 8) of PS6203 is in high voltage,
FB upper current protection: The pull down current
and IS (Pin 6, for current sense resister) is connected.
of FB when FB=6V and IS=0.6A in normal period.
Therefore, it is easy to open a divider between pin 6
Inside feedback power supply: The value of VCC
and 7 to meet the requirement of the safe regulation.
when there is no feedback circuit of PS6203 in normal
Although there is over-temperature protection,
period.
.
when high-power output is needed without considering
OC upper limit current: If FB=6V, the minimum OC
PCB heat dissipation, the output power and voltage
current when there is pull down current in FB.
may fall.
.
Oscillator cycle: Which is the function of the
capacitor connected to CT, about CT*25400 seconds.
© Power Source Inc.
Confidential
V1.1
PS6203
PWM Controller of High-performance Current Mode
Product Specification
PACKAGE MECHANICAL DATA
8-Pin Plastic DIP
Dimensions In Millimeters
Dimensions In Inches
Symbol
Min
Max
Min
Max
A
3.710
4.310
0.146
0.170
A1
0.510
A2
3.200
3.600
0.126
0.142
B
0.380
0.570
0.015
0.022
B1
0.020
1.524(BSC)
0.060(BSC)
C
0.204
0.360
0.008
0.014
D
9.000
9.400
0.354
0.370
E
6.200
6.600
0.244
0.260
E1
7.320
7.920
0.288
0.312
e
2.540(BSC)
0.100(BSC)
L
3.000
3.600
0.118
0.142
E2
8.400
9.000
0.331
0.354
© Power Source Inc.
Confidential
V1.1