A6259H Просмотр технического описания (PDF) - Allegro MicroSystems
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A6259H Datasheet PDF : 13 Pages
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STR-A6259H
Universal Input 13 W 100 kHz
Flyback Switching Regulators
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ELECTRICAL CHARACTERISTICS for Controller (MIC), valid at TA = 25°C, VCC = 18 V, unless otherwise specified
Characteristic
Symbol Terminal
Test Conditions
Min.
Operation Start Voltage
Operation Stop Voltage
Circuit Current In Operation
VCC(ON)
VCC(OFF)
ICC(ON)
5-3
(Power supply voltage at which device starts operating)
Measurement circuit 1, VCC = 0 though 13.1 to 16.1 V
12.9
5-3
(Power supply voltage at which device stops operating)
Measurement circuit 1, VCC = 16.1 through 9 to 11 V
9
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 = 13 V
8-3
(Center oscillation frequency of D terminal)
Measurement circuit 2
90
Frequency Jitter Deviation
Δf
8-3
Maximum frequency – minimum frequency
Measurement circuit 2
6
Maximum Duty Cycle
(Maximum width of the low portion of the D terminal
DMAX
8-3 waveform)
70
Measurement circuit 2
FM High Voltage
VHFM
(VFM at which the FM current is changed from 10 μA to
2-3 –10 μA)
4.0
Measurement circuit 2
FM Low Voltage
VLFM
(VFM at which the FM current is changed from –10 μA to
2-3 10 μA)
3.2
Measurement circuit 2
FM Outflow Current
IsorcFM
2-3
Outflow current from FM terminal at VFM = VLFM (3.7 V typ.)
Measurement circuit 2
7.7
FM Inflow Current
IsinkFM
2-3
Inflow current into FM terminal at VFM = VHFM (4.4 V typ.)
Measurement circuit 2
–15.4
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)
0.67
Measurement circuit 3
(The low portion of the D terminal waveform with
Leading Edge Blanking Time
twb
8-3 VOCP = 1 V)
240
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) 1.0
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) 7.3
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
12
OLP Delay Time
TOLP
4-3
(Time between surpassing VOLP(th) and stop of oscillation)
Measurement circuit 4
0.84
Maximum Feedback Current
IFB(MAX)
4-3
(Outflow current from FB/CC/OLP terminal at VFB = 0 V)
Measurement circuit 4
220
Typ.
14.3
10
–
–
100
10
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
110 KHz
14 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…
5
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036
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