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| 型號(hào)： | UC2843AQD8RG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類(lèi)： | 穩(wěn)壓器 |
| 英文描述： | 1 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | GREEN, PLASTIC, MS-012AA, SOIC-8 |
| 文件頁(yè)數(shù)： | 16/19頁(yè) |
| 文件大?。?/td> | 799K |
| 代理商： | UC2843AQD8RG4 |
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UC2842AQ, UC2843AQ, UC2844AQ, UC2845AQ
CURRENT-MODE PWM CONTROLLER
SGLS164 – APRIL 2003
6
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics, TA = –40_C to 125_C, VCC = 15 V (see Note 1), RT = 10 k, CT = 3.3 nF, and
TA = TJ (unless otherwise stated)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
PWM Section
Maximum duty cycle
UC2842A, UC2843A
94
96
100
%
Maximum duty cycle
UC2844A, UC2845A
47
48
50
%
Minimum duty cycle
0
%
Total Standby Current
Start-up current
0.3
0.5
mA
Operating supply current
FB = 0 V,
SENSE = 0 V
11
17
mA
VCC internal zener voltage
ICC = 25 mA
30
34
V
NOTES:
1. Adjust VCC above the start threshold before setting at 15 V.
2. Not production tested.
3. Temperature stability, sometimes referred to as average temperature coefficient, is described by the equation:
Temp Stability =
VREF (max) – VREF (min)
TJ (max) – TJ (min)
. VREF (max) and VREF (min) are the maximum and minimum reference voltage measured
over the appropriate temperature range. Note that the extremes in voltage do not necessarily occur at the extremes in temperature.
4. Output frequency equals oscillator frequency for the UC2842A and UC2843A. Output frequency is one half oscillator frequency for the
UC2844A and UC2845A.
5. This parameter is measured with RT = 10 k to VREF. This contributes approximately 300 A of current to the measurement. The total
current flowing into the RT/C pin will be approximately 300 A higher than the measured value.
6. Parameter measured at trip point of latch with VFB at 0 V.
7. Gain is defined by:
A =
DVCOMP
DVSENSE
; 0
v VSENSE v 0.8 V.
PA
RAMETER MEASUREMENT INFORMATION
Error Amp can source and sink up to 0.5 mA, and sink up to 2 mA.
Figure 1. Error Amp Configuration
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| UC2843AQD8RG4Q1 | 功能描述:電流型 PWM 控制器 Auto Cat Current- Mode PWM Controller RoHS:否 制造商:Texas Instruments 開(kāi)關(guān)頻率:27 KHz 上升時(shí)間: 下降時(shí)間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| UC2843AQD8RQ1 | 功能描述:電流型 PWM 控制器 Auto Cat Crnt-Mode PWM Controller RoHS:否 制造商:Texas Instruments 開(kāi)關(guān)頻率:27 KHz 上升時(shí)間: 下降時(shí)間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| UC2843AQDR | 功能描述:電流型 PWM 控制器 Auto Cat Crrnt-Mode RoHS:否 制造商:Texas Instruments 開(kāi)關(guān)頻率:27 KHz 上升時(shí)間: 下降時(shí)間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| UC2843AQDRHT | 制造商:Rochester Electronics LLC 功能描述:- Tape and Reel |
| UC2843AQG3 | 功能描述:電流型 PWM 控制器 Current Mode PWM RoHS:否 制造商:Texas Instruments 開(kāi)關(guān)頻率:27 KHz 上升時(shí)間: 下降時(shí)間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
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