AL8860QQElectrical Characteristics (TA = -40°C to +125°C, unless otherwise specified.) SymbolParameterConditionMinTypMaxUnitINPUT VOLTAGE VIN Input Voltage — 4.5 — 40 V IQ Quiescent Current CTRL Pin Floating, VIN =16V — 0.55 — mA ISHDN Shutdown Supply Current CTRL Pin Grounded — 50 80 µA HYSTERESTIC CONTROL Measured on SET Pin with T Respect to VIN Pin 96 100 104 mV C Mean Current Sense Threshold (TA = +25°C) U VSENSE Voltage Measured on SET Pin with D Respect to VIN Pin 95 100 105 mV O (TA = -40°C to +125°C) R P VSENSE_HYS Sense Threshold Hysteresis — — ±20 — %
ISET SET Pin Input Current VSET = VIN-0.1 — 8 — µA WENABLEE Voltage Range on CTRL Pin For Analog Dimming 0.3 — 2.5 V N VEN Analog Dimming Range For Analog Dimming 5 — 100 % VEN_ON DC Voltage on CTRL Pin to Enable VEN Rising — 0.25 — V VEN_OFF DC Voltage on CTRL Pin to Disable VEN Falling — 0.2 — V SWITCHING OPERATION RON SW Switch On Resistance @ISW = 100mA — 0.2 — Ω ISW_LEAK SW 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 fSW_MAX — — — 1.0 MHz Frequency DSW_MAX Maximum Duty Cycle — — 98 — % Internal Comparator Propagation tPD — — 100 — ns Delay (Note 8) THERMAL SHUTDOWN TOTP Over Temperature Shutdown — — +150 — °C TOTP_HYS Temperature Protection Hysteresis — — +30 — °C Note: 8. Guaranteed by design.