A1569E Datasheet, PDF (4/21 Pages) Allegro MicroSystems – LED Driver with Integrated Hall-Effect Switch

A1569E
LED Driver with Integrated Hall-Effect Switch
ELECTRICAL CHARACTERISTICS: Valid at T_A = –40°C to 85°C, V_IN = 7 to 24 V (unless otherwise specif ied)
Characteristic
Symbol
Test Conditions
Min.
Typ.¹
Max.
Electrical Characteristics
V_IN Functional Operating Range
V_IN (V_DD) Operating, T_J < 165°C
7
–
24
V_IN Quiescent Current
I_INQ
LA connected to VIN, LED off
–
6
10
V_IN Sleep Current
I_INS
SEN_EN and EXT = GND
–
10
25
Startup Time
SEN_EN = V_IN, |B| < |B_RPx| – 5 gauss,
t_ON
R_IREF = 600 Ω, C_FADE = 100 pF,
–
–
1
measured from V_IN > 7 V to I_LA source > 90% I_LAmax
External Response Time
SEN_EN = GND, V_IN > 7 V
t_EXT
R_IREF = 600 Ω, C_FADE = 100 pF, measured from
–
–
1
EXT > V_IH(MIN) to I_LA source > 5% I_LAmax
Current Regulation
Reference Voltage
Reference Current Ratio
Current Accuracy²
Output Source Current
V_IREF
267 µA < I_REF < 2 mA
–
1.2
–
G_H
(I_LA + 0.5) / I_REF
–
75
–
E_ILA
20 mA > I_LA > 150 mA
–5
±4
5
SEN_EN = high, B_FIELD < B_RP
–
G_H × I_REF
–
I_LA
R_IREF = 600 Ω, SEN_EN = high and B_FIELD < B_RP, or
EXT = high
–
150
170
Dropout Voltage
Current Slew Time
Logic Inputs
V_DO
t_FADE(MIN)
V_IN – V_LA , I_LA = 150 mA
V_IN – V_LA , I_LA = 50 mA
Current rising or falling between 10% and 90%,
C_FADE = 100 pF
–
–
2.4
–
800
–
–
80
–
Input Low Voltage
Input High Voltage
Pull-Down Resistor
Input Voltage Range
V_IL
V_IH
R_PD
V_LOGIC
SEN_EN, EXT
SEN_EN, EXT
SEN_EN, EXT
EXT, IREF, THTH, FADE
SEN_EN
–
–
0.8
2
–
–
–
50
–
–0.3
–
5.5
–0.3
–
24
Units
V
mA
µA
ms
ms
V
–
%
–
mA
V
mV
µs
V
V
kΩ
V
V
Continued on next page...
1 _{Typical data is at TA = 25ºC and VIN = 12 V and it is for design information only.}
2 _{When SEN_EN or EXT = high, EILA = 100 × {[( | ILA | + 0.5 ) × RIREF / 90 ] – 1}, with ILA in mA and RIREF in kΩ.}
Allegro MicroSystems, LLC
4
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com