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BQ40Z50-R2 数据表(PDF) 14 Page - Texas Instruments |
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BQ40Z50-R2 数据表(HTML) 14 Page - Texas Instruments |
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14 / 51 page  14 bq40z50-R2 SLUSCS4 – JUNE 2017 www.ti.com Product Folder Links: bq40z50-R2 Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated 7.23 PTC, PTCEN Typical values stated where TA = 25°C and VCC = 14.4 V, Min/Max values stated where TA = –40°C to 85°C and VCC = 2.2 V to 26 V (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT RPTC(TRIP) PTC trip resistance 1.2 2.5 3.95 MΩ VPTC(TRIP) PTC trip voltage VPTC(TRIP) = VPTCEN – VPTC 200 500 890 mV IPTC Internal PTC current bias TA = –40°C to 110°C 200 290 350 nA tPTC(DELAY) PTC delay time TA = –40°C to 110°C 40 80 145 ms 7.24 Internal 1.8-V LDO Typical values stated where TA = 25°C and VCC = 14.4 V, Min/Max values stated where TA = –40°C to 85°C and VCC = 2.2 V to 26 V (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT VREG Regulator voltage 1.6 1.8 2.0 V ΔVO(TEMP) Regulator output over temperature ΔVREG/ΔTA, IREG = 10 mA ±0.25% ΔVO(LINE) Line regulation ΔVREG/ΔVBAT, VBAT = 10 mA –0 .6% 0.5% ΔVO(LOAD) Load regulation ΔVREG/ΔIREG, IREG = 0 mA to 10 mA –1.5% 1.5% IREG Regulator output current limit VREG = 0.9 × VREG(NOM), VIN > 2.2 V 20 mA ISC Regulator short- circuit current limit VREG = 0 × VREG(NOM) 25 40 55 mA PSRRREG Power supply rejection ratio ΔVBAT/ΔVREG, IREG = 10 mA ,VIN > 2.5 V, f = 10 Hz 40 dB VSLEW Slew rate enhancement voltage threshold VREG 1.58 1.65 V 7.25 High-Frequency Oscillator Typical values stated where TA = 25°C and VCC = 14.4 V, Min/Max values stated where TA = –40°C to 85°C and VCC = 2.2 V to 26 V (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT fHFO Operating frequency 16.78 MHz fHFO(ERR) Frequency error TA = –20°C to 70°C, includes frequency drift –2.5% ±0.25% 2.5% TA = –40°C to 85°C, includes frequency drift –3.5% ±0.25% 3.5% tHFO(SU) Start-up time TA = –20°C to 85°C, oscillator frequency within +/–3% of nominal 4 ms oscillator frequency within +/–3% of nominal 100 µs 7.26 Low-Frequency Oscillator Typical values stated where TA = 25°C and VCC = 14.4 V, Min/Max values stated where TA = –40°C to 85°C and VCC = 2.2 V to 26 V (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT fLFO Operating frequency 262.144 kHz fLFO(ERR) Frequency error TA = –20°C to 70°C, includes frequency drift –1.5% ±0.25% 1.5% TA = –40°C to 85°C, includes frequency drift –2.5 ±0.25 2.5 fLFO(FAIL) Failure detection frequency 30 80 100 kHz |
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