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參數(shù)資料
| 型號(hào)： | 5962-89511012A |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 0.5 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, CQCC20 |
| 封裝： | CERAMIC, LCC-20 |
| 文件頁數(shù)： | 13/13頁 |
| 文件大?。?/td> | 350K |
| 代理商： | 5962-89511012A |
www.ti.com
Shutdown Options (See Block Diagram)
RD = 0
CT = .01 F
CT = .02 F
CT = .05 F
CT = 0.1 F
CT = 1 nF
CT = 5 nF
CT = 2 nF
6
5
7
RT
RD
CT
200
100
50
20
10
5
2
Timing
Resistance
k
R
T
1 2
5 10
20 50 100 200 1ms 2ms 5ms10ms
Charge Time ms
500
400
300
200
100
0
0.2
0.5
1
2
5
10
20
50 100 200
Dead
Time
Resistance
R
D
Charge Time ms
CT = 1 nF
CT = 2 nF
CT = 5 nF
CT = .01 F
CT = .05 F
CT = 0.1 F
CT = .02 F
125
°C
25
°C
55
°C
Max RD For a Given RT,
Min RT For a Given RD
500
400
300
200
100
0
2
4
6
8
10
12
Minimum Recommended RT kW
Maximum
recommended
RD
RL = ∞
RL = 1 M
RL = 300 k
RL = 100 k
RL = 30 k
Voltage Gain
Phase
80
60
40
20
0
100
1 k
10 k
100 k
1 M
10 M
f Frequency Hz
Open-Loop
V
oltage
Gain
dB
360
°
270
°
180
°
Open-Loop
Phase
VIN = 20 V,
TJ = 25°C
SLUS191C – FEBRUARY 1997 – REVISED JANUARY 2008
PRINCIPLES OF OPERATION AND TYPICAL CHARACTERISTICS (continued)
Since both the compensation and soft-start terminals (Pins 9 and 8) have current source pull-ups, either can
readily accept a pull-down signal which only has to sink a maximum of 100 A to turn off the outputs. This is
subject to the added requirement of discharging whatever external capacitance may be attached to these pins.
An alternate approach is the use of the shutdown circuitry of Pin 10 which has been improved to enhance the
available shutdown options. Activating this circuit by applying a positive signal on Pin 10 performs two functions;
the PWM latch is immediately set providing the fastest turn-off signal to the outputs; and a 150-A current sink
begins to discharge the external soft-start capacitor. If the shutdown command is short, the PWM signal is
terminated without significant discharge of the soft-start capacitor, thus, allowing, for example, a convenient
implementation of pulse-by-pulse current limiting. Holding Pin 10 high for a longer duration, however, will
ultimately discharge this external capacitor, recycling slow turn-on upon release.
Pin 10 should not be left floating as noise pickup could conceivably interrupt normal operation. All transitions of
the voltage on pin 10 should be within the time frame of one clock cycle and not repeated at a frequency higher
than 10 clock cycles.
Oscillator Charge Time vs RT and CT
Oscillator Discharge Time vs RT CT
Figure 8.
Figure 9.
Maximum Value RD vs Minimum Value RT
Error Amplifier Voltage Gain and Phase vs Frequency
Figure 10.
Figure 11.
Copyright 1997–2008, Texas Instruments Incorporated
9
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| 5962-89511032A | 制造商:Texas Instruments 功能描述:Voltage Mode PWM Controller 400mA 20-Pin LCCC Tube 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| 5962-8951103EA | 制造商:Texas Instruments 功能描述:Voltage Mode PWM Controller 400mA 16-Pin CDIP Tube 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Texas Instruments 功能描述:VOLT MODE PWM CNTRLR 400MA 16CDIP - Rail/Tube |
| 5962-8951104EA | 制造商:Texas Instruments 功能描述:Voltage Mode PWM Controller 400mA 16-Pin CDIP Tube 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Texas Instruments 功能描述:VOLT MODE PWM CNTRLR 400MA 16CDIP - Rail/Tube |
| 5962-8951105EA | 制造商:Texas Instruments 功能描述:Voltage Mode PWM Controller 400mA 16-Pin CDIP Tube |
| 5962-8951105V2A | 功能描述:電壓模式 PWM 控制器 Regulating PWM RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓?fù)浣Y(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel |
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