Datasheet AL8843Q (Diodes) - 5
| 制造商 | Diodes |
| 描述 | Automotive Compliant 40V 3A Step-Down LED Driver |
| 页数 / 页 | 18 / 5 — AL8843Q. Electrical Characteristics. Symbol. Parameter. Condition. Min. … |
| 文件格式/大小 | PDF / 1.2 Mb |
| 文件语言 | 英语 |
AL8843Q. Electrical Characteristics. Symbol. Parameter. Condition. Min. Typ. Max. Unit. SUPPLY VOLTAGE. HYSTERESTIC CONTROL
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AL8843Q Electrical Characteristics
(@VIN = 16V, TA = -40°C to +125°C. Typical values are at TA = +25°C, unless otherwise specified.)
Symbol Parameter Condition Min Typ Max Unit SUPPLY VOLTAGE
VIN Input Voltage — 4.5 — 40 V IQ Quiescent Current CTRL Pin Floating, VIN = 16V — 0.35 — mA VUVLO Under Voltage Lockout VIN Rising — 3.9 — V VUVLO_HYS Under Voltage Lockout Hysteresis — — 250 — mV
HYSTERESTIC CONTROL
Measured on SET Pin with VSET Mean Current Sense Threshold Voltage 96 100 104 mV Respect to VIN VSET_HYS Sense Threshold Hysteresis — — ±13 — % ISET SET Pin Input Current VSET = VIN -0.1V — 8 — µA
ENABLE AND DIMMING
VCTRL Voltage Range from 10% to 100% DC Dimming Relative to GND For Analog Dimming 0.4 — 2.5 V — Analog Dimming Range — 10 — 100 % VCTRL_ON DC Voltage on CTRL Pin for Analog Dimming On VCTRL Rising — 0.45 — V VCTRL_OFF DC Voltage on CTRL Pin for Analog Dimming Off VCTRL Falling — 0.40 — V
SWITCHING OPERATION
RON SW Switch On Resistance @ISW = 100mA — 0.2 — Ω ISW_LEAK SW Switch Leakage Current — — — 8 μA tSS Soft Start Time VIN = 16V, CCTRL = 1nF — 1.5 — ms fSW Switching Frequency VIN = 16V, VO = 9.6V (3 LEDs) — 250 — kHz L= 47μH, ILED =1A fSW_MAX Recommended Maximum Switch Frequency — — — 1 MHz tON_REC Recommended Minimum Switch ON Time For 4% Accuracy — 500 — ns tPD Internal Comparator Propagation Delay (Note 8) — — 100 — ns
THERMAL SHUTDOWN
TOTP Over Temperature Protection — — +150 — °C TOTP_HYS Temperature Protection Hysteresis — — +30 — °C Note: 8. Guaranteed by design. AL8843Q 5 of 18 October 2019 Document number: DS41943 Rev. 2 - 2
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© Diodes Incorporated Document Outline Pin Assignments Description Applications Features
(@VIN = 16V, TA = -40°C to +125°C. Typical values are at TA = +25°C, unless otherwise specified.)
Symbol Parameter Condition Min Typ Max Unit SUPPLY VOLTAGE
VIN Input Voltage — 4.5 — 40 V IQ Quiescent Current CTRL Pin Floating, VIN = 16V — 0.35 — mA VUVLO Under Voltage Lockout VIN Rising — 3.9 — V VUVLO_HYS Under Voltage Lockout Hysteresis — — 250 — mV
HYSTERESTIC CONTROL
Measured on SET Pin with VSET Mean Current Sense Threshold Voltage 96 100 104 mV Respect to VIN VSET_HYS Sense Threshold Hysteresis — — ±13 — % ISET SET Pin Input Current VSET = VIN -0.1V — 8 — µA
ENABLE AND DIMMING
VCTRL Voltage Range from 10% to 100% DC Dimming Relative to GND For Analog Dimming 0.4 — 2.5 V — Analog Dimming Range — 10 — 100 % VCTRL_ON DC Voltage on CTRL Pin for Analog Dimming On VCTRL Rising — 0.45 — V VCTRL_OFF DC Voltage on CTRL Pin for Analog Dimming Off VCTRL Falling — 0.40 — V
SWITCHING OPERATION
RON SW Switch On Resistance @ISW = 100mA — 0.2 — Ω ISW_LEAK SW Switch Leakage Current — — — 8 μA tSS Soft Start Time VIN = 16V, CCTRL = 1nF — 1.5 — ms fSW Switching Frequency VIN = 16V, VO = 9.6V (3 LEDs) — 250 — kHz L= 47μH, ILED =1A fSW_MAX Recommended Maximum Switch Frequency — — — 1 MHz tON_REC Recommended Minimum Switch ON Time For 4% Accuracy — 500 — ns tPD Internal Comparator Propagation Delay (Note 8) — — 100 — ns
THERMAL SHUTDOWN
TOTP Over Temperature Protection — — +150 — °C TOTP_HYS Temperature Protection Hysteresis — — +30 — °C Note: 8. Guaranteed by design. AL8843Q 5 of 18 October 2019 Document number: DS41943 Rev. 2 - 2
www.diodes.com
© Diodes Incorporated Document Outline Pin Assignments Description Applications Features