UCC28500 Datasheet, PDF (5/31 Pages) Texas Instruments – BICMOS PFC/PWM COMBINATION CONTROLLER

UCC28500, UCC28501, UCC28502, UCC28503
UCC38500, UCC38501, UCC38502, UCC38503
SLUS419C − AUGUST 1999 − REVISED NOVEMBER 2001
electrical characteristics T_A = 0°C to 70°C for the UCC3850X, –40°C to 85°C for the UCC2850X,
T_A = T_J, VCC = 12 V, RT = 22 kΩ, CT = 330 pF (unless otherwise noted)
PFC gate driver
PARAMETER
GT1 pull up resistance
GT1 pull down resistance
GT1 output rise time
GT1 output fall time
Maximum duty cycle
Minimum controlled duty cycle
TEST CONDITIONS
IOUT from −100 mA to –200 mA
IOUT = 100 mA
CLOAD = 1 nF,
VGT1 from 0.7 V to 9.0 V
RLOAD = 10 Ω
CLOAD = 1 nF,
VGT1 from 9.0 V to 0.7 V
RLOAD = 10 Ω
f = 100 kHZ
second stage undervoltage lockout (UVLO2)
PARAMETER
PWM turn-on reference (UCCx8500/501)
Hysteresis (UCCx8500/501)
PWM turn−on reference (UCCx8502/503)
Hysteresis (UCCx8502/503)
TEST CONDITIONS
second stage soft-start
PARAMETER
SS2 charge current
Input voltage (VERR)
SS2 discharge current
TEST CONDITIONS
IVERR = 2 mA,UVLO = Low
ENBL = High, UVLO = Low, SS2 = 2.5 V
second stage duty cycle clamp
PARAMETER
Maximum duty cycle
TEST CONDITIONS
second stage pulse-by-pulse current sense
PARAMETER
Current sense comparator threshold
TEST CONDITIONS
VERR = 2.5 V measured on ISENSE2
second stage overcurrent limit
PARAMETER
Peak current comparator threshold
Input bias current
TEST CONDITIONS
second stage gate driver
PARAMETER
TEST CONDITIONS
GT2 pull up resistance
IOUT from −100 mA to –200 mA
GT2 pull down resistance
IOUT = 100 mA
GT2 output rise time
CLOAD = 1 nF,RLOAD = 10 Ω
VGT2 from 0.7 V to 9.0 V
GT2 output fall time
CLOAD = 1 nF,RLOAD = 10 Ω
VGT2 from 9.0 V to 0.7 V
NOTES: 1. Ensured by design. Not production tested.
2. See Figure 6 for reference variation.
3. See Figure 5 for reference variation for VCC < 10.8 V .
MIN
TYP
MAX UNITS
5
12 Ω
2
10 Ω
25
50 ns
93%
10
50 ns
95%
100%
2%
MIN
6.30
0.96
6.30
2.4
TYP
6.75
1.20
6.75
3
MAX
7.30
1.44
7.30
3.6
UNITS
V
V
V
V
MIN
–7.3
3
TYP
–10
MAX
–12.5
300
10
UNITS
µA
mV
mA
MIN
TYP
44%
MAX UNITS
50%
MIN
0.94
TYP
1.05
MAX UNITS
1.15
V
MIN
1.15
TYP
1.30
50
MAX
1.45
UNITS
V
nA
MIN
TYP
MAX UNITS
5
12 Ω
3
10 Ω
25
50 ns
25
50 ns
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