A8501GLPTR-T データシートの表示（PDF） - Allegro MicroSystems
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A8501GLPTR-T Datasheet PDF : 24 Pages
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A8501
2 MHz, 4 Channel×100 mA WLED/RGB Driver
with Output Disconnect
ELECTRICAL CHARACTERISTICS Valid using circuit shown in figure 1; VIN = 12 V, EN = SEL1 = SEL2 =5 V, RISET = 12.4 kΩ,
RFSET = 24.3 kΩ, VTO shorted to VTI guaranteed over the full operating temperature range with TA =TJ , typical specifications are at
TA = 25ºC; unless otherwise noted
Characteristics
Symbol
Test Conditions
Min.
Typ.
Max.
Unit
General
Input Voltage Range
Undervoltage Lockout Threshold
UVLO Hysteresis Window
Overvoltage Lockout Threshold
VIN
VUVLO(th)
VUVLO(hys)
VOVLO(th)
VIN falling
VIN rising
2 MHz switching at no load
8
–
21
V
5.7
6.5
6.8
V
0.21
0.55
0.81
V
29
32
34
V
4
11
15
mA
Supply Current
IS
Logic Input levels (DIM, EN, SELx Pins)
EN = VIL, in shutdown, TA = 25°C,
CAP = VIN = SW = OVP = 16 V
IS = IVIN + ISW + ICAP + IOVP
EN = VIL, in shutdown, TA = –40°C to 125°C,
CAP = VIN = SW = OVP = 16 V,
IS = IVIN + ISW + ICAP + IOVP
EN = VIL, not in shutdown, IS = IVIN
–
3.5
6
μA
–
3.5
10
μA
–
2
4
mA
Input Voltage Level-Low
Input Voltage Level-High
Input Leakage Current (EN, DIM pins)
Input Leakage Current (SELx pins)
Overvoltage Protection
VIL
VIH
Ilkg1
VDIM, VEN = 5 V
Ilkg2
VSELx = 5 V
–
–
0.4
V
1.5
–
–
V
30
50
70
μA
–
–
1
μA
Output Overvoltage Threshold
OVP Sense Current
OVP Leakage Current
Boost Switch
VOVP(th)
IOVPH
IOVP(lkg)
OVP pin connected to OUT pin
VOVP = 18 V, EN = VIL, in shutdown
18
19.5
21
V
183
200
217
μA
–
0.1
1
μA
Switch On Resistance
Switch Leakage Current
Switch Current Limit
LED Current Sinks
RSWDS(on)
ISW(lkg)
ISW(lim)
ISW = 2 A
VSW = 21 V
40
100
300
mΩ
–
0.1
10
μA
3
3.6
5.3
A
LEDx Regulation Voltage
IISET to ILEDx Current Gain
ISET Pin Voltage
VTO Pin Voltage
VTO Pin Current Maximum
VTI Pin Voltage
VLED
AISET
VISET
VTO
ITO(max)
VTI(falling)
VTI(rising)
VLED1 = VLED2 = VLED3 = VLED4
IISET = 100 μA, DIM = VIL
IISET = 100 μA, DIM= VIH
IVTO = 1 mA
IVTO increased until VTO drops by 1%
VTI start >1.34 V, VTI pin voltage decreasing
before control changes to VTI pin
VTI start <1 V VTI pin increasing before
changing to internal reference
–
750
1100
mV
914
960
1008
A/A
228
240
252
A/A
1.13
1.235
1.34
V
2.00
2.46
2.65
V
1.5
2.4
5
mA
1.00
1.12
1.23
V
1.13
1.235
1.34
V
ISET Pin Allowable Current Range
IISET
Continued on the next page…
20
–
100
μA
Allegro MicroSystems, Inc.
5
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
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