Datasheet Texas Instruments TL2843BQDRQ1 — 数据表

TL2843B-Q1
SLVSAE2A – JULY 2010 – REVISED FEBRUARY 2012 www.ti.com HIGH-PERFORMANCE CURRENT-MODE PWM CONTROLLER
Check for Samples: TL2843B-Q1 FEATURES 1 Qualified for Automotive Applications
Low Start-Up Current ( 5 kΩ:
f ≉ 1.72 / RTCT
VREF
RT
RT/CT
CT
GND Figure 3. Oscillator Section 10 Submit Documentation Feedback Copyright © 2010–2012, Texas Instruments Incorporated Product Folder Link(s): TL2843B-Q1 TL2843B-Q1
SLVSAE2A – JULY 2010 – REVISED FEBRUARY 2012 www.ti.com TIMING RESISTANCE
vs
FREQUENCY DEAD TIME
vs
TIMING CAPACITANCE
100 100 CT = 10 nF VCC = 15 V
RT ≥ 5 kΩ
TA = 25В°C 40 CT = 4.7 nF
CT = 2.2 nF R T -Timing Resistance -k Ω Dead Time -µ s 40
10
4 1 CT = 1 nF CT = 22 nF 10 CT = 47 nF
CT = 100 nF 4 0.4
VCC = 15 V …