參數(shù)資料
型號(hào)： TNY253G
廠(chǎng)商： POWER INTEGRATIONS INC
元件分類(lèi)： 穩(wěn)壓器
英文描述： TinySwitch Family Energy Efficient, Low Power Off-line Switchers
中文描述： 0.4 A SWITCHING REGULATOR, 48 kHz SWITCHING FREQ-MAX, PDSO8
封裝： PLASTIC, SMD-8
文件頁(yè)數(shù)： 7/20頁(yè)
文件大?。?/td> 498K
代理商： TNY253G
C
7/01
TNY253/254/255
7
Figure 11. 3.6 W Constant Voltage-Constant Current Cellular Phone Charger Circuit.
constant voltage and constant current output.
TinySwitch
is
always powered from the input high voltage, therefore it does
not require bias winding for power. Consequently, its operation
is not dependent on the level of the output voltage. This allows
for constant current charger designs that work down to zero
volts on the output.
Figure11 shows a 5.2V, 3.6W cellular phone charger circuit
that uses the TNY254 and provides constant voltage and constant
current output over an universal input (85 to 265VAC) range.
The AC input is rectified and filtered by D1 - D4, C1 and C2 to
create a high voltage DC bus connected to T1 in series with the
high voltage MOSFET inside the TNY254. The inductor L1
forms a
π
-filter in conjunction with C1 and C2. The resistor R1
damps resonances in the inductor L1. The low frequency of
operation of TNY254 (44kHz) allows use of the simple
π
-filter
described above in combination with a single Y1-capacitor C8
to meet worldwide conducted EMI standards. The diode D6,
capacitor C4 and resistor R2 comprise the clamp circuit that
limits the turn-off voltage spike on the
TinySwitch
DRAIN pin
to a safe value. The secondary winding is rectified and filtered
by D5 and C5 to provide the 5.2V output. Additional filtering
Figure 12. 0.5 W Open Loop AC Adapter Circuit.
PI-2244-082898
TinySwitch
EN
D
S
BP
+ 5.2 V
RTN
D1
1N4005
C1
6.8
μ
F
400 V
Fusible
RF1
10
C3
0.1
μ
F
85-265
VAC
L1
560
μ
H
D2
1N4005
D3
1N4005
D4
1N4005
R2
100 k
1 W
U2
LTV817
D5
FR201
10
L2
3.3
μ
H
C5
220
μ
F
25 V
C2
4.7
μ
F
400 V
C6
220
μ
F
16 V
R7
100
R3
22
R4
1
1 W
R9
47
Q1
2N3904
R8
820
VR1
1N5230B
4.7 V
C8
2.2 nF
Y1 Safety
U1
TNY254P
C4
2200 pF
D6
1N4937
R6
0.82
1/2 W
T1
R1
1.2 k
1
2
5
R5
18
1/8 W
PI-2190-031501
TinySwitch
EN
D
S
BP
+ 9 V
RTN
D1
1N4004
C1
2.2
μ
F
200 V
Fusible
RF1
1.8
C4
68 pF
1 KV
115 VAC
± 15%
R2
100
D2
1N4004
C3
0.1
μ
F
D3
1N3934
10
C6
100
μ
F
16V
C2
2.2
μ
F
200 V
VR1
1N5239B
C5
2.2 nF
Y1 Safety
U1
TNY253P
T1
1
5
6
相關(guān)PDF資料
PDF描述
TNY253P TinySwitch Family Energy Efficient, Low Power Off-line Switchers
TNY254 TinySwitch Family Energy Efficient, Low Power Off-line Switchers
TNY254G TinySwitch Family Energy Efficient, Low Power Off-line Switchers
TNY254P TinySwitch Family Energy Efficient, Low Power Off-line Switchers
TNY255 TinySwitch Family Energy Efficient, Low Power Off-line Switchers
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TNY253GN 功能描述:交流/直流開(kāi)關(guān)轉(zhuǎn)換器 2W 85-265 VAC 4W 100/115/230 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(kāi)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
TNY253GN-TL 功能描述:交流/直流開(kāi)關(guān)轉(zhuǎn)換器 2W 85-265 VAC 4W 100/115/230 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(kāi)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
TNY253G-TL 功能描述:交流/直流開(kāi)關(guān)轉(zhuǎn)換器 2W 85-265 VAC 4W 100/115/230 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(kāi)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
TNY253P 功能描述:交流/直流開(kāi)關(guān)轉(zhuǎn)換器 2W 85-265 VAC 4W 100/115/230 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(kāi)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
TNY253PN 功能描述:交流/直流開(kāi)關(guān)轉(zhuǎn)換器 2W 85-265 VAC 4W 100/115/230 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(kāi)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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