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參數(shù)資料
| 型號： | LNK500P |
| 廠商： | POWER INTEGRATIONS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Energy Efficient, CV or CV/CC Switcher for Very Low Cost Adapters and Chargers |
| 中文描述： | 0.4 A SWITCHING REGULATOR, 49.5 kHz SWITCHING FREQ-MAX, PDIP7 |
| 封裝： | PLASTIC, MS-001-AB, DIP-8 |
| 文件頁數(shù)： | 4/20頁 |
| 文件大小： | 505K |
| 代理商： | LNK500P |
4
LNK500
B
3/03
The characteristics described above provide an approximate
CV/CC power supply output without the need for secondary
side voltage or current feedback. The output voltage regulation
is influenced by how well the voltage across C2 tracks the
reflected output voltage. This tracking is influenced by the
value of the transformer leakage inductance which introduces
an error. Resistor R2 and capacitor C2 partially filter the
leakage inductance voltage spike reducing this error. This
circuitry, used with standard transformer construction
techniques provides much better output load regulation than a
linear transformer, making this an ideal power supply solution
in many low power applications. If tighter load regulation is
required, an optocoupler configuration can be used while still
employing the constant output current characteristics provided
by
LinkSwitch
.
Optional Secondary Feedback
Figure 6 shows a typical power supply outline schematic using
LinkSwitch
with optocoupler feedback to improve output voltage
regulation. On the primary side, the schematic differs from
Figure 5 by the addition of R3, C3 and optocoupler U1. R3
forms a potential divider with R1 to limit the U1 collector
emitter voltage.
On the secondary side, the addition of voltage sense circuit
components R4, VR1 and U1 LED provide the voltage feedback
signal. In the example shown, a simple Zener (VR1) reference
is used though a precision TL431 reference is typically needed
to provide
±
5% output voltage tolerancing and cable drop
compensation, if required. R4 provides biasing for VR1. The
regulated output voltage is equal to the sum of the VR1 Zener
voltage plus the forward voltage drop of the U1 LED. R5 is an
optional low value resistor to limit U1 LED peak current due to
output ripple. Manufacturer
’
s specifications for U1 current and
VR1 slope resistance should be consulted to determine whether
R5 is required.
U1 is arranged with collector connected to primary ground and
emitter to the anode of D1. This connection keeps the opto in an
electrically
“
quiet
”
position in the circuit. If the opto was
Figure 6. Power Supply Outline Schematic with Optocoupler Feedback.
Figure 7. Influence of the Optocoupler on the Power Supply Output Characteristic.
LNK500
LinkSwitch
85-265
VAC
V
OUT
RTN
PI-3418-111802
S
D
C
C1
C3
C2
U1
R4
R5
VR1
R1
R2
D1
R3
U1
Output Voltage
Tolerance envelope
without optocoupler
Inherent
CC to CV
transition
point
Load variation
during battery
charging
Voltage
feedback
threshold
Characteristic with
optocoupler
Typical inherent
characteristic without
optocoupler
PI-2788-092101
Output Current
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| LNK500G-TL | Energy Efficient, CV or CV/CC Switcher for Very Low Cost Adapters and Chargers |
| LNK500P-TL | Energy Efficient, CV or CV/CC Switcher for Very Low Cost Adapters and Chargers |
| LNK501G | Energy Efficient, CV/CC Switcher for Very Low Cost Chargers and Adapters |
| LNK501P | Energy Efficient, CV/CC Switcher for Very Low Cost Chargers and Adapters |
| LNK501 | Energy Efficient, CV/CC Switcher for Very Low Cost Chargers and Adapters |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LNK500P_1 | 制造商:POWERINT 制造商全稱:Power Integrations, Inc. 功能描述:2.4W Cell Phone Charger |
| LNK500PN | 功能描述:交流/直流開關(guān)轉(zhuǎn)換器 3W 85-265 VAC 4W 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 |
| LNK500P-TL | 制造商:POWERINT 制造商全稱:Power Integrations, Inc. 功能描述:Energy Efficient, CV or CV/CC Switcher for Very Low Cost Adapters and Chargers |
| LNK501 | 制造商:POWERINT 制造商全稱:Power Integrations, Inc. 功能描述:Energy Efficient, CV/CC Switcher for Very Low Cost Chargers and Adapters |
| LNK501G | 功能描述:IC SWIT OCP CV/CC HV 8SMD RoHS:否 類別:集成電路 (IC) >> PMIC - AC-DC 轉(zhuǎn)換器，離線開關(guān) 系列:LinkSwitch® 標(biāo)準(zhǔn)包裝:1 系列:FPS™ 輸出隔離:隔離 頻率范圍:61kHz ~ 73kHz 輸入電壓:8 V ~ 26 V 輸出電壓:650V 功率（瓦特）:12W 工作溫度:-40°C ~ 115°C 封裝/外殼:8-DIP（0.300"，7.62mm） 供應(yīng)商設(shè)備封裝:8-MDIP 包裝:Digi-Reel® 其它名稱:FSL206MRBNFSDKR |
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