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参数资料
型号： UCC38501DWTR
厂商： TEXAS INSTRUMENTS INC
元件分类： 稳压器
英文描述： 1.2 A POWER FACTOR CONTROLLER WITH POST REGULATOR, 120 kHz SWITCHING FREQ-MAX, PDSO20
封装： GREEN, PLASTIC, SOIC-20
文件页数： 29/34页
文件大小： 758K
代理商： UCC38501DWTR
UCC28500, UCC28501, UCC28502, UCC28503
UCC38500, UCC38501, UCC38502, UCC38503
SLUS419C AUGUST 1999 REVISED NOVEMBER 2001
4
www.ti.com
electrical characteristics TA = 0°C to 70°C for the UCC3850X, –40°C to 85°C for the UCC2850X,
TA = TJ, VCC = 12 V, RT = 22 k, CT = 330 pF (unless otherwise noted)
voltage reference
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
Input voltage
TA = 0°C to 70°C
7.387
7.500
7.613
V
Input voltage
TA = –40°C to 85°C
7.35
7.50
7.65
V
Load regulation
IREF = 1 mA to 2 mA,
See Note 2
0
10
mV
Line regulation
VCC = 10.8 V to 15 V,
See Note 3
0
10
mV
Short circuit current
VREF = 0V
20
–25
50
mA
oscillator
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
Frequency, initial accuracy
TA = 25°C
85
100
115
kHz
Frequency, voltage stability
VCC = 10.8 V to 15 V
1%
Frequency, total variation
Line, Temp
80
120
kHz
Ramp peak voltage
4.5
5
5.5
V
Ramp amplitude voltage (peak to peak)
3.5
4
4.5
V
peak current limit
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
PKLMT reference voltage
–15
0
15
mV
PKLMT propagation delay
150
300
500
ns
multiplier
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
IMOUT, high-line low-power output current
IAC = 500 A, VFF = 4.7 V,
VAOUT = 1.25 V,
0
°C ≤ TA ≤ 85°C
0
–6
20
IMOUT, high-line low-power output current
IAC = 500 A, VFF = 4.7 V,
VAOUT = 1.25 V,
–40
°C ≤ TA ≤ 85°C
0
–6
23
A
IMOUT, high-line high-power output current
IAC = 500 A, VFF = 4.7 V,
VAOUT = 5 V
70
–90
105
A
IMOUT, low-line low-power output current
IAC = 150 A, VFF = 1.4 V,
VAOUT = 1.25 V
10
–19
50
IMOUT, low-line high-power output current
IAC = 150 A, VFF = 1.4 V,
VAOUT = 5 V
268
–300
345
IMOUT, IAC-limited output current
IAC = 150 A, VFF = 1.3 V,
VAOUT = 5 V
250
–300
400
Gain constant (K)
IAC = 300 A, VFF = 2.8 V,
VAOUT = 2.5 V
0.5
1
1.5
1/V
IAC = 150 A, VFF = 1.4 V,
VAOUT = 0.25 V
0
–2
1/V
IAC = 500 A, VFF = 4.7 V,
VAOUT = 0.25 V
0
–2
A
IMOUT, zero current
IAC = 500 A, VFF = 4.7 V,
VAOUT = 0.5 V,
0
°C ≤ TA ≤ 85°C
0
–3
A
IAC = 500 A, VFF = 4.7 V,
VAOUT = 0.5 V,
40
°C ≤ TA ≤ 85°C
0
–3.5
A
Power limit (IMOUT × VFF)
IAC = 150 A, VFF = 1.4 V,
VAOUT = 5 V
375
–420
485
W
zero power
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
Zero power comparator threshold
Measured on VAOUT
0.175
0.330
0.500
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 .
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