STR3A151, STR3A152, STR3A153,
STR3A154, STR3A155
PWM Off-Line Switching Regulator ICs
Features and Benefits
• Current mode PWM control
• Built-in Random Switching function: reduces
EMI noise, simplifies EMI filters, and cuts cost by
external part reduction
• Built-in Slope Compensation function: avoids
subharmonic oscillation
• Built-in Leading Edge Blanking (LEB) function
• Auto Standby function:
▫
Input power, P
IN
< 10 mW at no load with low power
consumption shunt regulator
▫
Normal load operation: PWM switching
▫
Light load operation: Standby mode (Burst oscillation)
Description
STR3A100 series are power ICs for switching power supplies,
incorporating a power MOSFET and a current mode PWM
controller IC in one package.
Including a startup circuit and a standby function in the
controller, the product achieves low power consumption, low
standby power, and high cost-effectiveness in power supply
systems, while reducing external components.
The products are provided in an industry standard DIP8
package.
Applications
Continued on the next page…
Package: DIP8
Switching power supplies for electronic devices such as:
• Stand-by power supply for LCD/PDP television,
desktop PC, multi-function printer, audio equipment,
and so forth
• Small switched-mode power supply (SMPS) for printer,
BD/DVD player, set-top box, and so forth
• Auxiliary power supply for air conditioner, refrigerator,
washer, dishwasher, and so forth
Not to scale
Typical Application
C9
CRD Snubber Circuit
D1
VAC
C5
C1
D3
R3
P
S
PC1
R5
C6
C7
8
7
6
5
D/ST D/ST D/ST D/ST
NC
T1
D4
L2
VOUT
R9
R4
R8
C8
R6
R7
D2
R2
U2
C4
U1
STR3A100
C2
D
GND
S/OCP VCC GND FB/OLP
C, RC
Damper
Snubber
Circuit
R
OCP
1
2
3
4
C3
PC1
STR3A150-DS
SANKEN ELECTRIC CO., LTD.
July 20, 2012
STR3A151, STR3A152, STR3A153,
STR3A154, STR3A155
PWM Off-Line Switching Regulator ICs
Features and Benefits (continued)
• Soft Start function: reduces stress on internal power MOSFET
and secondary output rectifier diode at startup
• Protection Functions:
▫
Overcurrent Protection function (OCP); pulse-by-pulse,
built-in compensation circuit to minimize OCP point variation
on AC input voltage
▫
Overload Protection function (OLP); auto restart, built-in
timer, reduces heat during overload condition, and no external
components required
▫
Overvoltage Protection function (OVP); latched shutdown
▫
Thermal Shutdown function (TSD); latched shutdown
Selection Guide
Part Number
f
OSC
(kHz)
MOSFET
V
DSS
(min)
(V)
R
DS(on)
(max)
(Ω)
4.0
3.0
1.9
1.4
1.1
230 VAC
24
30
36
40
43
P
OUT
*
(W)
85 to 265 VAC
16
23
30
32
35
OVP/TSD
STR3A151
STR3A152
STR3A153
STR3A154
STR3A155
67
650
Latched
*The listed output power is based on the thermal ratings, and the peak output power can be 120% to
140% of the value stated here. At low output voltage and short duty cycle, the output power may be less
than the value stated here.
STR3A150-DS
SANKEN ELECTRIC CO., LTD.
2
July 20, 2012
STR3A151, STR3A152, STR3A153,
STR3A154, STR3A155
PWM Off-Line Switching Regulator ICs
The polarity value for current specifies a sink as "+," and a source as “−,” referencing the IC.
Absolute Maximum Ratings
Unless specifically noted, T
A
is 25°C
Characteristic
Symbol
STR3A151
STR3A152
Drain Peak Current
1
I
DPEAK
STR3A153
STR3A154
STR3A155
STR3A151
STR3A152
Avalanche Energy
2
E
AS
STR3A153
STR3A154
STR3A155
S/OCP Pin Voltage
Control Part Input Voltage
FB/OLP Pin Voltage
FB/OLP Pin Sink Current
V
OCP
V
CC
V
FB
I
FB
STR3A151
STR3A152
MOSFET Power Dissipation
3
P
D1
STR3A153
STR3A154
STR3A155
Control Part Power Dissipation
Operating Ambient Temperature
Storage Temperature
Channel Temperature
1
Refer
2
Refer
Notes
Pins
Rating
3.6
4
Unit
A
A
A
A
A
mJ
mJ
mJ
mJ
mJ
V
V
V
mA
W
W
W
W
°C
°C
°C
Single pulse
8−1
5.2
6.4
7.2
Single pulse, I
LPEAK
= 2.13 A
Single pulse, I
LPEAK
= 2.19 A
Single pulse, I
LPEAK
= 2.46 A
Single pulse, I
LPEAK
= 2.66 A
Single pulse, I
LPEAK
= 3.05 A
1−3
2−3
4−3
4−3
8−1
53
56
72
83
110
−2
to 6
32
−0.3
to 14
1.0
1.68
Mounted on 15 mm × 15 mm
printed circuit board
8−1
1.76
1.81
P
D2
T
OP
T
stg
T
ch
V
CC
× I
CC
2−3
–
–
–
1.3
−40
to 125
−40
to 125
150
to MOSFET Safe Operating Area Curve.
to MOSFET Avalanche Energy Derating Coefficient Curve.
3
Refer to MOSFET Temperature versus Power Dissipation Curve.
STR3A150-DS
SANKEN ELECTRIC CO., LTD.
3
July 20, 2012
STR3A151, STR3A152, STR3A153,
STR3A154, STR3A155
PWM Off-Line Switching Regulator ICs
Electrical Characteristics of Control Part
Unless specifically noted, T
A
is 25°C, V
CC
= 18 V
Characteristic
Operation Start Voltage
Operation Stop Voltage*
Circuit Current in Operation
Minimum Start Voltage
Startup Current
Startup Current Threshold Biasing
Voltage*
Average Operation Frequency
Frequency Modulation Deviation
Maximum Duty Cycle
Leading Edge Blanking Time
OCP Compensation Coefficient
OCP Compensation Duty Cycle Limit
OCP Threshold Voltage at
Zero Duty Cycle
OCP Threshold Voltage at
36% Duty Cycle
Maximum Feedback Current
Minimum Feedback Current
Symbol
V
CC(ON)
V
CC(OFF)
I
CC(ON)
V
ST(ON)
I
STARTUP
V
CC(BIAS)
f
OSC(AVG)
Δf
D
MAX
t
BW
DPC
D
DPC
V
OCP(L)
V
OCP(H)
I
FB(MAX)
I
FB(MIN)
STR3A151
STR3A152
STR3A153
STR3A154
STR3A155
V
FB(OLP)
I
CC(OLP)
t
OLP
V
FB(CLAMP)
V
CC(OVP)
T
J(TSD)
V
CC
= 32 V
V
CC
= 12 V
V
CC
= 32 V
V
CC
= 32 V
V
CC
= 13.5 V
V
CC
= 12 V
Test Conditions
Pins
2–3
2–3
2–3
8–3
2–3
2–3
8–3
8–3
8–3
–
–
−
1–3
1–3
4–3
4–3
4–3
4–3
4–3
2–3
–
4–3
2–3
−
Min.
13.8
7.3
−
−
−3.9
8.5
60
−
65
−
−
−
0.69
0.79
−110
−30
1.09
0.85
7.3
−
54
11.0
27.5
135
Typ.
15.3
8.1
−
40
−2.5
9.5
67
5
74
350
17
36
0.78
0.88
−70
−15
1.21
0.98
8.1
230
70
12.8
29.5
−
Max.
16.8
8.9
2.5
−
−1.1
10.5
74
−
83
−
−
−
0.87
0.97
−35
−7
1.33
1.09
8.9
−
86
14.0
31.5
−
Unit
V
V
mA
V
mA
V
kHz
kHz
%
ns
mV/μs
%
V
V
μA
μA
V
V
V
μA
ms
V
V
°C
FB/OLP Oscillation Stop Threshold
Voltage
V
FB(OFF)
OLP Threshold Voltage
OLP Operation Current
OLP Delay Time
FB/OLP Clamp Voltage
OVP Threshold Voltage
Thermal Shutdown Activating
Temperature
*V
CC(BIAS)
> V
CC(OFF)
always.
STR3A150-DS
SANKEN ELECTRIC CO., LTD.
4
July 20, 2012
STR3A151, STR3A152, STR3A153,
STR3A154, STR3A155
PWM Off-Line Switching Regulator ICs
Electrical Characteristics of MOSFET
Unless specifically noted, T
A
is 25°C
Characteristic
Drain-to-Source Breakdown Voltage
Drain Leakage Current
Symbol
V
DSS
I
DSS
STR3A151
STR3A152
On-Resistance
R
DS(ON)
STR3A153
STR3A154
STR3A155
Switching Time
t
f
STR3A151
STR3A152
STR3A153
Thermal Resistance
R
θch-C
STR3A154
STR3A155
The thermal
resistance
between channel
and case. Case
temperature (T
C
)
is measured at
the center of the
branded side.
8–1
–
8–1
Test Conditions
Pins
8–1
8–1
Min.
650
–
–
–
–
–
–
–
–
Typ.
–
–
–
–
–
–
–
–
–
Max.
–
300
4.0
3.0
1.9
1.4
1.1
250
18
Unit
V
μA
Ω
Ω
Ω
Ω
Ω
ns
°C/W
–
–
–
17
°C/W
STR3A150-DS
SANKEN ELECTRIC CO., LTD.
5
July 20, 2012
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