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A8439 Datasheet(Scheda tecnica) 4 Page - Allegro MicroSystems

Numero della parte A8439
Dettagli  Photoflash Capacitor Charger with IGBT Driver and Refresh
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Produttore  ALLEGRO [Allegro MicroSystems]
Homepage  http://www.allegromicro.com
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Photoflash Capacitor Charger with IGBT Driver and Refresh
A8439
4
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
ELECTRICAL CHARACTERISTICS Typical values at TA = 25°C and VIN = 3.3 V (unless otherwise noted)
Characteristics
Symbol
Test Conditions
Min.
Typ. Max. Units
Supply Voltage*
VIN
3
5.5
V
Supply Current
IIN
Charging
1.5
mA
Charging done / Refresh monitoring
300
600
μA
Shutdown (VCHARGE= 0 V, VTRIGGER= 0 V)
0.01
1
μA
Primary Side Current Limit
(ILIM clock input at CHARGE pin)
ISWLIM1
1.2
1.4
1.6
A
ISWLIM2
1.2
A
ISWLIM3
1.0
A
ISWLIM4
0.86
A
ISWLIM5
0.7
A
ISWLIM6
0.55
A
ISWLIM7
0.4
A
ISWLIM8
0.27
A
SW On Resistance
RDS(On)SW
VIN = 3.3 V, ID = 800 mA, TA = 25°C
0.27
Ω
SW Leakage Current*
ISWLKG
VSW = 35 V
1
μA
SW Maximum Off-Time
tOFF(Max)
–18–
μs
SW Maximum On-Time
tON(Max)
–18–
μs
CHARGE Input Current
ICHARGE
VCHARGE = VIN
––1
μA
CHARGE Input Voltage*
VCHARGE(H)
2––
V
VCHARGE(L)
0.8
V
ILIM Clock High Time at
CHARGE Pin
tILIM1(H)
Initial pulse
20
μs
tILIM(H)
Subsequent pulses
0.2
μs
ILIM Clock Low Time at
CHARGE Pin
tILIM(L)
0.2
μs
Total ILIM Setup Time
tILIM(SU)
–54–
μs
¯D¯¯O¯¯N¯¯E¯ Output Leakage Current*
IDONELKG
––1
μA
¯D¯¯O¯¯N¯¯E¯ Output Low Voltage*
VDONE(L)
32 μA into ¯D¯¯O¯¯N¯¯E¯ pin
100
mV
FB Voltage Threshold*
VFB
1.187 1.205 1.223
V
FB Input Current
IFB
VFB = 1.205 V
–120
nA
Auto-Refresh Threshold Level
VFBR
1.07
V
UVLO Enable Threshold
VUVLO
VIN rising
2.55
2.65
2.75
V
UVLO Hysteresis
VUVLOHYS
150
mV
IGBT Driver
IGBTDRV On Resistance to VIN
RDS(On)I-V
VIN = 3.3 V, VIGBTDRV= 1.5 V, VTRIGGER = VIN
–5–
Ω
IGBTDRV On Resistance to GND
RDS(On)I-G
VIN = 3.3 V, VIGBTDRV= 1.5 V, VTRIGGER = 0 V
6
Ω
TRIGGER Input Current
ITRIGGER
VTRIGGER = VIN
––1
μA
TRIGGER Input Voltage*
VTRIGGER(H)
2––
V
VTRIGGER(L)
0.8
V
Propagation Delay, Rising
tDr
Rgate=12 Ω, CLOAD = 6500 pF, VIN = 3.3 V
30
ns
Propagation Delay, Falling
tDf
Rgate=12 Ω, CLOAD = 6500 pF, VIN = 3.3 V
30
ns
Output Rise Time
tr
Rgate=12 Ω, CLOAD = 6500 pF, VIN = 3.3 V
70
ns
Output Fall Time
tf
Rgate=12 Ω, CLOAD = 6500 pF, VIN = 3.3 V
70
ns
*Guaranteed by design and characterization over operating temperature range, –40°C to 85°C.




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