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PDF A6252M Data sheet ( Hoja de datos )
| Número de pieza | A6252M | |
| Descripción | STR-A6252M | |
| Fabricantes | Sanken Electric | |
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Sanken Power Devices
from Allegro MicroSystems
www.datasheet4u.com
STR-A6252M
Universal-Input 20 W 67 kHz
Flyback Switching Regulators
Approximate Scale 1:1
Package DIP-8
FEATURES AND BENEFITS
67 kHz PWM with ±5% frequency jittering for EMI noise
filtering and cost reduction
Rugged 650 V avalanche-rated MOSFET:
• Simplified surge absorption
• No VDSS derating required
Low RDS(on) : 2.8 Ω maximum
Auto-burst mode for stand-by operation or light loads; less
transformer audible noise
Built-in leading edge blanking
Soft start and low start-up current; start-up circuit disabled in
operation
Auto-burst stand-by (intermittent operation) input power
<0.1 W at no load
Built-in constant-voltage/constant current (CV/CC)
Multiple protections:
• Pulse-by-pulse overcurrent protection (OCP)
• Overload protection (OLP) with auto restart
• Latching overvoltage protection (OVP)
• Undervoltage lockout (UVLO) with hysteresis
• Latching thermal shutdown (TSD)
The STR-A6252M is a 67 kHz PWM topology (with ±5%
frequency jittering for minimum EMI) regulator specifically
designed to satisfy the requirements for increased integration and
reliability in flyback converters. It incorporates a primary control
and drive circuit with an avalanche-rated power MOSFET. This
is a higher-frequency version of the STR-A6252.
Covering the power range from below 24 watts for a
230 VAC input, or to 20 watts for a universal (85 to 264 VAC)
input, this device can be used in a wide range of applications,
from DVD players and VCR player/recorders to ac adapters
for cellular phones and digital cameras. An auto-burst standby
function reduces power consumption at light load, while multiple
protections, including the avalanche-energy guaranteed MOSFET,
provide high reliability of system design.
Cycle-by-cycle current limiting, undervoltage lockout with
hysteresis, overvoltage protection, and thermal shutdown protect
the power supply during the normal overload and fault conditions.
Overvoltage protection and thermal shutdown are latched after a
short delay. The latch may be reset by cycling the input supply.
Low start-up current and a low-power standby mode selected
from the secondary circuit completes a comprehensive suite of
features.
It is provided in an 8-pin mini-DIP plastic package with pin
6 removed. The leadframe plating is pure Sb, and the package
complies with RoHS.
All performance characteristics given are typical values for circuit or
system baseline design only and are at the nominal operating voltage and Always order by complete part number, e.g.: STR-A6252M
an ambient temperature of +25°C, unless otherwise stated.
Datasheet 28103.44-5a
1 page  
STR-A6252M
Universal-Input 20 W 67 kHz
Flyback Switching Regulators
www.datasheet4u.com
ELECTRICAL CHARACTERISTICS for Controller (MIC), valid at TA = 25°C, VCC = 18 V, unless otherwise specified
Characteristic
Symbol Terminal
Test Conditions
Operation Start Voltage
VCC(ON)
5-3
(Power supply voltage at which device starts operating)
Measurement circuit 1, VCC = 0 through 12.9 to 15.7 V
Operation Stop Voltage
VCC(OFF)
5-3
(Power supply voltage at which device stops operating)
Measurement circuit 1, VCC = 15.7 through 9 to 11 V
Circuit Current In Operation
ICC(ON)
5-3
(Inflow current into power supply terminal, in operation)
Measurement circuit 1
Initialization Circuit Current
Center Switching Frequency
ICC(OFF)
fosc(av)
(Inflow current into power supply terminal,, while subject to
5-3 UVLO prior to operation)
Measurement circuit 1, VCC = 12 V
8-3
(Center oscillation frequency of D terminal)
Measurement circuit 2
Frequency Jitter Deviation
Δf
8-3
Maximum frequency – minimum frequency
Measurement circuit 2
Maximum Duty Cycle
DMAX
(Maximum width of the low portion of the D terminal
8-3 waveform)
Measurement circuit 2
FM High Voltage
VHFM
(VFM at which the FM current is changed from 10 μA to
2-3 –10 μA)
Measurement circuit 2
FM Low Voltage
VLFM
(VFM at which the FM current is changed from –10 μA to
2-3 10 μA)
Measurement circuit 2
FM Outflow Current
IsorcFM
2-3
Outflow current from FM terminal at VFM = VLFM (3.7 V typ.)
Measurement circuit 2
FM Inflow Current
IsinkFM
2-3
Inflow current into FM terminal at VFM = VHFM (4.4 V typ.)
Measurement circuit 2
OCP Threshold Voltage
VOCP(th)
(The drain current at which the low portion of the D
1-3
terminal waveform becomes shorter than the high portion,
with VOCP increasing)
Measurement circuit 3
Leading Edge Blanking Time
twb
(The low portion of the D terminal waveform with
8-3 VOCP = 1 V)
Measurement circuit 3
Burst Threshold Voltage
Vburst(th)
(FB/CC/OLP terminal voltage at which D terminal
4-3 waveform oscillation stops due to VFB decreasing from 5 V)
Measurement circuit 4
OLP Threshold Voltage
VOLP(th)
(FB/CC/OLP terminal voltage at which D terminal
4-3 waveform oscillation stops due to VFB increasing from 5 V)
Measurement circuit 4
Output Current at OLP
Operation
IOLP
4-3
(Outflow current from FB/CC/OLP terminal at VFB = 8 V)
Measurement circuit 4
OLP Delay Time
TOLP
4-3
(Time between surpassing VOLP(th) and stop of oscillation)
Measurement circuit 4
Maximum Feedback Current
IFB(MAX)
4-3
(Outflow current from FB/CC/OLP terminal at VFB = 0 V)
Measurement circuit 4
Min.
12.9
9
–
–
60
4.0
70
4.0
3.2
7.7
–15.4
0.67
240
1.0
7.3
12
0.84
220
Typ.
14.3
10
–
–
67
6.7
76
4.5
3.6
11
–11
0.74
350
1.12
8.6
18
1.2
310
Max. Unit
15.7 V
11 V
4 mA
25 μA
74 KHz
9.4 kHz
82 %
5.0 V
4.0 V
15.4 μA
–7.7 μA
0.81 V
460 ns
1.24 V
9.9 V
25 μA
1.56 s
430 μA
Continued on next page…
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036
5
5 Page 
STR-A6252M
Universal-Input 20 W 67 kHz
Flyback Switching Regulators
www.datasheet4u.com
Orientation of Devices in
Shipping Tubes
PACKING SPECIFICATIONS
Minimum packing option: Tubes
Stopper, with
no tab
Type A
50 pieces
Stopper, with
attached tab
Type B
Shipping Tube
Dimensions
Inner Carton Dimensions
Capacity: 50 tubes
per inner carton
Outer Carton Dimensions
Capacity: 4 inner
cartons per outer carton;
10,000 devices maximum
per outer carton
510
130
524
140
520
265
290
All dimensions: mm
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036
535
11
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet A6252M.PDF ] | |
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