TIL5942 Datasheet, PDF (6/19 Pages) Texas Instruments – CURRENT-MODE-PWM CONTROLLER WITH OPTOISOLATED VOLTAGE REFERENCE AND ERROR AMPLIFIER

TIL5942, TIL5942A
CURRENT-MODE-PWM CONTROLLER
WITH OPTOISOLATED VOLTAGE REFERENCE AND ERROR AMPLIFIER
SOES040 – OCTOBER 1997
electrical characteristics over recommended operating junction temperature range, V_CC = 15 V,
R_T = 3.9 kΩ, C_T = 1 nF (unless otherwise noted) (continued)
current sense
PARAMETER
IIB(IS)
td
VIT(CS)
Input bias current, IS
Delay time to output
Current sense threshold
TEST CONDITIONS
MIN TYP MAX UNIT
–4 –10 µA
70
ns
0.9 1.0 1.1 V
integrating capacitor current
PARAMETER
IO(cap) Capacitor integrating current at VC with LED off
IL
Photodiode light current at VC, I(VC)(on) – I(VC)(off)
TEST CONDITIONS
II(LED) = 0
II(LED) = 10 mA, TA = 25°C
MIN TYP MAX UNIT
–5 –10 µA
5
8
µA
PWM (pulse-width modulation)
PARAMETER
Maximum duty cycle
Minimum duty cycle
TEST CONDITIONS
CL = 1 nF,
CREG = 0.1 µF
CL = 1 nF,
CREG = 0.1 µF
MIN TYP MAX UNIT
97%
0
UVLO (under voltage lockout)
PARAMETER
VIT(H)
VIT(L)
Start-up threshold voltage
Minimum operating voltage after start-up
TEST CONDITIONS
MIN TYP MAX UNIT
15
16
17 V
9
10
11 V
supply current
PARAMETER
ICC(off) Start-up current
ICC(on) Operating supply current
TEST CONDITIONS
VCC < 15 V
VCC > 11 V
MIN TYP MAX UNIT
55 100 µA
8
13
16 mA
output section
PARAMETER
VOH High-level output voltage
VOL
tr
tf
Low-level output voltage
Rise time
Fall time
TEST CONDITIONS
IO = –20 mA
IO = –200 mA
IO = 20 mA
IO = 200 mA
TJ = 25°C,
TJ = 25°C,
CL = 1 nF
CL = 1 nF
MIN TYP
11 11.7
10.5 11.2
0.78
1.38
20
20
MAX UNIT
V
0.9
V
2
35 ns
35 ns
regulator
PARAMETER
VO(REG) Regulator output Voltage
IOS(REG) Regulator short-circuit output current
TEST CONDITIONS
VCC = 17 V
VO = 0 V
MIN TYP MAX
12 12.5 13.5
–9 –12.5 –15.0
UNIT
V
mA
6
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