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參數(shù)資料
| 型號(hào)： | HPA00001D |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | LOW POWER CURRENT MODE PUSH-PULL PWM |
| 中文描述： | 低功耗電流模式推拉脈寬調(diào)制 |
| 文件頁(yè)數(shù)： | 3/10頁(yè) |
| 文件大?。?/td> | 160K |
| 代理商： | HPA00001D |
SLUS456D
–
APRIL 1999 - REVISED AUGUST 2002
3
www.ti.com
electrical characteristics, T
A
= 0
°
C to 70
°
C for the UCC3808A-x,
–
40
°
C to 85
°
C for the UCC2808A-x,
VDD = 10 V (see Note 6), 1-
μ
F capacitor from VDD to GND, R = 22 k
, C = 330 pF T
A
= T
J
, (unless
otherwise noted)
Error Amplifier Section
Input voltage
COMP = 2 V
1.95
2
2.05
V
μ
A
dB
Input bias current
–
1
1
Open loop voltage gain
60
80
COMP sink current
FB = 2.2 V,
COMP = 1 V
0.3
2.5
mA
COMP source current
FB = 1.3 V,
COMP = 3.5 V
–
0.2
–
0.5
mA
PWM Section
Maximum duty cycle
Measured at OUTA or OUTB
48
49
50
%
Minimum duty cycle
COMP = 0 V
0
%
Current Sense Section
Gain
See Note 2
1.9
2.2
2.5
V/V
Maximum input signal
COMP = 5 V
See Note 3
0.45
0.5
0.55
V
CS to output delay
COMP = 3.5 V,
CS from 0 mV to 600 mV
100
200
ns
CS source current
–
200
nA
CS sink current
CS = 0.5 V,
RC = 5.5 V
See Note 7
5
10
mA
Over current threshold
0.7
0.75
0.8
V
COMP to CS offset
CS = 0 V
0.35
0.8
1.2
V
Output Section
OUT low level
I = 100 mA
0.5
1
V
OUT high level
I =
–
50 mA,
VDD
–
OUT
0.5
1
V
Rise time
CL = 1 nF
CL = 1 nF
25
60
ns
Fall time
25
60
ns
Undervoltage Lockout Section
Start threshold
UCCx808A
–
1
See Note 6
11.5
12.5
13.5
V
UCCx808A
–
2
4.1
4.3
4.5
V
Minimum operating voltage after start
UCCx808A
–
1
7.6
8.3
9
V
UCCx808A
–
2
3.9
4.1
4.3
V
H steresis
Hysteresis
UCCx808A
–
1
3.5
4.2
5.1
V
UCCx808A
–
2
0.1
0.2
0.3
V
Soft Start Section
COMP rise time
FB = 1.8 V,
Rise from 0.5 V to 4 V
3.5
20
ms
Overall Section
Startup current
VDD < start threshold
130
260
μ
A
mA
Operating supply current
FB = 0 V,
CS = 0 V
See Note 5 and 6
1
2
VDD zener shunt voltage
IDD = 10 mA
VCOMP
VCS
See Note 4
13
14
15
V
NOTES:
2. Gain is defined by: A
, 0
≤
VCS
≤
0.4 V.
3. Parameter measured at trip point of latch with FB at 0 V.
4. Start threshold and zener shunt threshold track one another.
5. Does not include current in the external oscillator network.
6. For UCCx808A
–
1, set VDD above the start threshold before setting at 10 V.
7. The internal current sink on the CS pin is designed to discharge an external filter capacitor. It is not intended to be a dc sink path.
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