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參數(shù)資料
| 型號(hào)： | TOP222G |
| 廠商： | POWER INTEGRATIONS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | CONNECTOR ACCESSORY |
| 中文描述： | 0.55 A SWITCHING REGULATOR, 110 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | SMD-8 |
| 文件頁(yè)數(shù)： | 3/20頁(yè) |
| 文件大小： | 176K |
| 代理商： | TOP222G |
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12/97
TOP221-227
3
T OPS witc h
Family Functional Description
TOPSwitch
is a self biased and protected linear control current-
to-duty cycle converter with an open drain output. High
efficiency is achieved through the use of CMOS and integration
of the maximum number of functions possible. CMOS process
significantly reduces bias currents as compared to bipolar or
discrete solutions. Integration eliminates external power
resistors used for current sensing and/or supplying initial start-
up bias current.
During normal operation, the duty cycle of the internal output
MOSFET decreases linearly with increasing CONTROL pin
current as shown in Figure 4. To implement all the required
control, bias, and protection functions, the DRAIN and
CONTROL pins each perform several functions as described
below. Refer to Figure 2 for a block diagram and to Figure 6 for
timing and voltage waveforms of the
TOPSwitch
integrated
circuit.
PI-2040-050197
DMAX
DMIN
D
IC (mA)
2.0
6.0
Slope = PWM Gain
IB
ICD1
Auto-restart
Figure 4. Relationship of Duty Cycle to CONTROL Pin Current.
DRAIN
0
VIN
VC
0
4.7 V
5.7 V
8 Cycles
95%
5%
Off
Switching
Switching
Off
IC
Charging CT
ICD1
Discharging CT
ICD2
Discharging CT
IC
Charging CT
Off
PI-1956-092496
DRAIN
0
VIN
VC
0
4.7 V
5.7 V
Off
Switching
(b)
(a)
C
T
is the total external capacitance
connected to the CONTROL pin
Figure 5. Start-up Waveforms for (a) Normal Operation and (b) Auto-restart.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TOP222P | CONNECTOR ACCESSORY |
| TOP223G | CONNECTOR ACCESSORY |
| TOP224G | Three-terminal Off-line PWM Switch |
| TOP224P | Three-terminal Off-line PWM Switch |
| TOP223Y | Three-terminal Off-line PWM Switch |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TOP222GN | 功能描述:交流/直流開關(guān)轉(zhuǎn)換器 10W 85-265 VAC 15W100/115/230 VAC RoHS:否 制造商:STMicroelectronics 輸出電壓:800 V 輸入/電源電壓（最大值）:23.5 V 輸入/電源電壓（最小值）:11.5 V 開關(guān)頻率:115 kHz 電源電流:1.6 mA 工作溫度范圍:- 40 C to + 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SSO-10 封裝:Reel |
| TOP222GN-TL | 功能描述:交流/直流開關(guān)轉(zhuǎn)換器 10W 85-265 VAC 15W100/115/230 VAC RoHS:否 制造商:STMicroelectronics 輸出電壓:800 V 輸入/電源電壓（最大值）:23.5 V 輸入/電源電壓（最小值）:11.5 V 開關(guān)頻率:115 kHz 電源電流:1.6 mA 工作溫度范圍:- 40 C to + 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SSO-10 封裝:Reel |
| TOP222G-TL | 功能描述:交流/直流開關(guān)轉(zhuǎn)換器 10W 85-265 VAC 15W100/115/230 VAC RoHS:否 制造商:STMicroelectronics 輸出電壓:800 V 輸入/電源電壓（最大值）:23.5 V 輸入/電源電壓（最小值）:11.5 V 開關(guān)頻率:115 kHz 電源電流:1.6 mA 工作溫度范圍:- 40 C to + 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SSO-10 封裝:Reel |
| TOP222P | 功能描述:交流/直流開關(guān)轉(zhuǎn)換器 10W 85-265 VAC 15W100/115/230 VAC RoHS:否 制造商:STMicroelectronics 輸出電壓:800 V 輸入/電源電壓（最大值）:23.5 V 輸入/電源電壓（最小值）:11.5 V 開關(guān)頻率:115 kHz 電源電流:1.6 mA 工作溫度范圍:- 40 C to + 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SSO-10 封裝:Reel |
| TOP222PN | 功能描述:交流/直流開關(guān)轉(zhuǎn)換器 10W 85-265 VAC 15W100/115/230 VAC RoHS:否 制造商:STMicroelectronics 輸出電壓:800 V 輸入/電源電壓（最大值）:23.5 V 輸入/電源電壓（最小值）:11.5 V 開關(guān)頻率:115 kHz 電源電流:1.6 mA 工作溫度范圍:- 40 C to + 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SSO-10 封裝:Reel |
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