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LP8866S-Q1 Datasheet(PDF) 10 Page - Texas Instruments |
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LP8866S-Q1 Datasheet(HTML) 10 Page - Texas Instruments |
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10 / 82 page  6.5 Electrical Characteristics (continued) Limits apply over the full operation temperature range –40°C ≤TA ≤ +125°C , unless otherwise speicified. VIN = 12 V, VDD = 3.3 V PARAMETER TEST CONDITIONS MIN TYP MAX UNIT fDIM LED dimming frequency PWM_FSET =3.92 kΩ 141 152 163 Hz fDIM LED dimming frequency PWM_FSET = 4.75 kΩ 283 305 327 fDIM LED dimming frequency PWM_FSET = 5.76 kΩ 567 610 653 fDIM LED dimming frequency PWM_FSET = 7.87 kΩ 1135 1221 1307 fDIM LED dimming frequency PWM_FSET = 11 kΩ 2270 2441 2612 fDIM LED dimming frequency PWM_FSET = 17.8 kΩ 4541 4883 5225 fDIM LED dimming frequency PWM_FSET = 42.4 kΩ 9082 9766 10450 fDIM LED dimming frequency PWM_FSET = 124 kΩ 18163 19531 20899 DIM Dimming ratio fPWM_OUT = 152 Hz 32000:1 DIM Dimming ratio fPWM_OUT = 4.88 kHz 1000:1 VHEADRO OM LED sink headroom 0.7 V VHEADRO OM_HYS LED sink headroom hysteresis 0.8 V VLEDSHO RT LED internal short threshold 5.4 V VSHORTG ND LED short to ground threshold 0.24 V tPWM_OUT LED output minimum pulse 200 ns Boost Converter Electrical Characteristics fSW Switching Frequency BST_FSET = 7.87 kΩ 93 100 107 kHz fSW Switching Frequency BST_FSET = 4.75 kΩ 186 200 214 kHz fSW Switching Frequency BST_FSET = 5.76 kΩ 281 303 325 kHz fSW Switching Frequency BST_FSET = 3.92 kΩ 372 400 428 kHz fSW Switching Frequency BST_FSET = 11 kΩ 465 500 535 kHz fSW Switching Frequency BST_FSET = 17.8 kΩ 1690 1818 1946 kHz fSW Switching Frequency BST_FSET = 42.4 kΩ 1860 2000 2140 kHz fSW Switching Frequency BST_FSET = 124 kΩ 2066 2222 2378 kHz VISNS External FET current limit VISNS threshold, RSENSE = 15 to 50 mΩ 180 200 220 mV ISEL_MAX IDAC maximum current VDD = 3.3 V 36.4 38.7 40.2 µA RDS_ONH RDSON of high-side FET to gate driver VGD/(RDS_ON + total resistance to gate input of SW FET) must not be higher than 2.5 A 1.4 Ω RDS_ONL RDSON of low-side FET to gate driver VGD/(RDS_ON + total resistance to gate input of SW FET) must not be higher than 2.5 A 0.75 Ω tSTARUP Start-up time Delay from beginning of boost Soft-start to when LED drivers can begin 50 ms TON Minimum switch on-time 150 ns TOFF Minimum switch off time 150 ns (1) This specification is not ensured by ATE. 6.6 Logic Interface Characteristics Limits apply over the full operation temperature range –40°C ≤ TA ≤ +125°C , unless otherwise speicified. VIN = 12 V, VDD = 5 V, VEN = 3.3 V PARAMETER TEST CONDITIONS MIN TYP MAX UNIT LOGIC INPUT EN LP8866S-Q1 SNVSBD1A – AUGUST 2020 – REVISED FEBRUARY 2021 www.ti.com 10 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated Product Folder Links: LP8866S-Q1 |
Similar Part No. - LP8866S-Q1_V01 |
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Similar Description - LP8866S-Q1_V01 |
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