Datasheet AL8861Q (Diodes) - 4

AL8861Q Electrical Characteristics
(TA = -40°C to +125°C, unless otherwise specified.)
Symbol Parameter Conditions Min Typ Max Unit INPUT VOLTAGE
VIN Input Voltage — 4.5 — 40 V IQ Quiescent Current VSET Pin Floating, VIN = 16V — 0.55 — mA ISHDN Shutdown Supply Current VSET Pin Grounded — 55 100 µA
HYSTERESTIC CONTROL
Measured on ISENSE Pin with
T
Respect to VIN Pin 96 100 104 mV
C
(T
U
A =+25°C) VSENSE Mean Current Sense Threshold Voltage
D
Measured on VSET Pin with Respect to VIN Pin
O
95 100 105 mV
R
(TA = -40°C to +125°C)
P
V

SENSE_HYS Sense Threshold Hysteresis — — ±13 — %
W
IISENSE ISENSE Pin Input Current VISENSE = VIN-0.1V — 8 — µA
E ENABLE N
VSET Range on VSET Pin For Analog Dimming 0.3 — 2.5 V VEN Analog Dimming Range For Analog Dimming 5 — 100 % VEN_ON DC Voltage on VSET Pin to Enable VEN Rising — 0.25 — V VEN_OFF DC Voltage on VSET Pin to Disable VEN Falling — 0.2 — V
SWITCHING OPERATION
RON LX Pin Switch On-Resistance @ILX = 100mA — 0.2 — Ω ILX_LEAK LX Pin Switch Leakage Current — — — 5 μA tSS Soft-Start Time VIN = 16V, CEN = 1nF — 1.5 — ms VIN = 16V, VO = 9.6V (3 LEDs) fSW Operating Frequency — 250 — kHz L = 47μF, I = 0.25A (ILED = 1A) Recommended Minimum Switch ON tON_REC For 4% Accuracy — 500 — ns Time Recommended Maximum Switch fLX_MAX — — — 1.0 MHz Frequency DLX_MAX Maximum Duty Cycle — — 98 — % Internal Comparator Propagation Delay tPD — — 100 — ns (Note 8) ILX(MAX) Current Limit for Internal Power Switch — 2 — — A
THERMAL SHUTDOWN
TOTP Over Temperature Protection — — +150 — °C TOTP_HYS Temperature Protection Hysteresis — — +30 — °C Note: 8. Guaranteed by design. AL8861Q 4 of 15 May 2019 Document number: DS41798 Rev. 2 - 2
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