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參數(shù)資料
| 型號： | 5962-8990502VEA |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 2.2 A SWITCHING CONTROLLER, 1150 kHz SWITCHING FREQ-MAX, CDIP16 |
| 封裝： | CERAMIC, DIP-16 |
| 文件頁數(shù)： | 14/18頁 |
| 文件大?。?/td> | 478K |
| 代理商： | 5962-8990502VEA |
UC1823A,UC2823A, UC2823B,
UC3823A,UC3823B,UC1825A,
UC2825A,UC2825B,UC3825A,UC3825B
SLUS334C AUGUST 1995 REVISED AUGUST 2004
www.ti.com
5
ELECTRICAL CHARACTERISTICS
TA = 55°C to 125°C for the UC1823A/UC1825A, TA = 40°C to 85°C for the UC2823x/UC2825x, TA = 0°C to 70°C for the UC3823x/UC3825x,
RT = 3.65 k, CT = 1 nF, VCC = 12 V, TA = TJ (unless otherwise noted)
PWM COMPARATOR
IBIAS
Bias current, RAMP
VRAMP = 0 V
1
8
A
Minimum duty cycle
0%
Maximum duty cycle
85%
tLEB
Leading edge blanking time
RLEB = 2 k, CLEB = 470 pF
300
375
450
ns
RLEB
Leading edge blanking resistance
VCLK/LEB = 3 V
8.5
10.0
11.5
k
VZDC
Zero dc threshold voltage, EAOUT
VRAMP = 0 V
1.10
1.25
1.4
V
tDELAY Delay-to-output time
VEAOUT = 2.1 V, VILIM = 0 V to 2 V step
50
80
ns
CURRENT LIMIT / START SEQUENCE / FAULT
ISS
Soft-start charge current
VSS= 2.5 V
8
14
20
A
VSS
Full soft-start threshold voltage
4.3
5
V
IDSCH
Restart discharge current
VSS= 2.5 V
100
250
350
A
ISS
Restart threshold voltage
0.3
0.5
V
IBIAS
ILIM bias current
VILIM = 0 V to 2 V step
15
A
ICL
Current limit threshold voltage
0.95
1
1.05
V
Overcurrent threshold voltage
1.14
1.2
1.26
V
td
Delay-to-output time, ILIM(1)
VILIM = 0 V to 2 V step
50
80
ns
OUTPUT
Low-level output saturation voltage
IOUT = 20 mA
0.25
0.4
Low-level output saturation voltage
IOUT = 200 mA
1.2
2.2
V
High-level output saturation voltage
IOUT = 20 mA
1.9
2.9
V
High-level output saturation voltage
IOUT = 200 mA
2
3
tr,
tf
Rise/fall time(1)
CL = 1 nF
20
45
ns
UNDERVOLTAGE LOCKOUT (UVLO)
UC2823B, UC2825B, UC3825B, UC3825B
16
17
Start threshold voltage
UC1823A, UC1825A, UC2823A, UC2825A
UC3825A, UC3825A
8.4
9.2
9.6
Stop threshold voltage
UC2823B, UC2825B, UC3825B, UC3825B
9
10
V
OVLO hysteresis
UC1823A, UC1825A, UC2823A, UC2825A
UC3825A, UC3825A
0.4
0.8
1.2
V
OVLO hysteresis
UC2823B, UC2825B, UC3825B, UC3825B
5
6
7
SUPPLY CURRENT
Isu
Startup current
VC = VCC = VTH = 0.5 V
100
300
A
ICC
Input current
28
36
mA
(1) Ensured by design. Not production tested.
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