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參數(shù)資料
| 型號(hào)： | LT1513CR-2 |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類(lèi)： | 穩(wěn)壓器 |
| 英文描述： | SEPIC Constant- or Programmable-Current/ Constant-Voltage Battery Charger |
| 中文描述： | 5.4 A BATTERY CHARGE CONTROLLER, 580 kHz SWITCHING FREQ-MAX, PSSO7 |
| 封裝： | PLASTIC, D2PAK-7 |
| 文件頁(yè)數(shù)： | 14/16頁(yè) |
| 文件大?。?/td> | 299K |
| 代理商： | LT1513CR-2 |
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14
LT1513/LT1513-2
TYPICAL APPLICATIO
N
S
This Cold Cathode Fluorescent Lamp driver uses a Royer
class self-oscillating sine wave converter to driver a high
voltage lamp with an AC waveform. CCFL Royer converters
have significantly degraded efficiency if they must operate at
low input voltages, and this circuit was designed to handle
input voltages as low as 2.7V. Therefore, the LT1513 is
connected to generate a negative current through L2 that
allows the Royer to operate as if it were connected to a
constant higher voltage input.
The Royer output winding and the bulb are allowed to float in
this circuit. This can yield significantly higher efficiency in
situations where the stray bulb capacitance to surrounding
enclosure is high. To regulate bulb current in Figure 9, Royer
inputcurrent is sensed with R2 and filtered with R3 and C6.
This negative feedback signal is applied to the I
FB
pin of the
LT1513. For more information on this circuit contact the LTC
Applications Department and see Design Note 133. Consid-
erable written application literature on Royer CCFL circuits is
also available from other LTC Application and Design Notes.
2.7V
TO 20V
L1
20
μ
H
C2
4.7
μ
F
CERAMIC
C1
47
μ
F
ELECT
R4
20k
R3
10k
R5
330k
PWM DIMMING
(
≈
1kHz)
5
1
2
3
10
6
T1
4
C5
4.7nF
C9
1
μ
F
C10
10nF
D1
3A
R1
470
C3
0.082
μ
F
WIMA
C4
27pF
3kV
LAMP CURRENT
5.6mA
NEGATIVE VOLTAGE
IS GENERATED HERE
R2
0.25
1513 F09
R7
2k
D2
15V
3
2
4, TAB
7
6
1
5
L2
20
μ
H
CCFL
C6
0.1
μ
F
+
Q2
Q1
C2: TOKIN MULTILAYER CERAMIC
C3: MUST BE A LOW LOSS CAPACITOR, WIMA MKP-20 OR EQUIVALENT
L1, L2: COILTRONICS CTX20-4 (MUST BE SEPARATE INDUCTORS)
Q1, Q2: ZETEX ZTX849 OR FZT849
T1: COILTRONICS CTX110605 (67:1)
LT1513-2
V
FB
V
IN
V
SW
I
FB
GND
S/S
V
C
Figure 9. CCFL Power Supply for Floaing Lamp Configuration Operates on 2.7V
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LT1513IR-2 | SEPIC Constant- or Programmable-Current/ Constant-Voltage Battery Charger |
| LT1513C | SEPIC Constant- or Programmable-Current/ Constant-Voltage Battery Charger |
| LT1513CR | SEPIC Constant- or Programmable-Current/ Constant-Voltage Battery Charger |
| LT1513I | SEPIC Constant- or Programmable-Current/ Constant-Voltage Battery Charger |
| LT1513IR | SEPIC Constant- or Programmable-Current/ Constant-Voltage Battery Charger |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT1513CRPBF | 制造商:Linear Technology 功能描述:LT1513CRPBF |
| LT1513CT7 | 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:Battery Management |
| LT1513CT7-2 | 制造商:LINER 制造商全稱(chēng):Linear Technology 功能描述:SEPIC Constant- or Programmable-Current/ Constant-Voltage Battery Charger |
| LT1513I | 制造商:LINER 制造商全稱(chēng):Linear Technology 功能描述:SEPIC Constant- or Programmable-Current/ Constant-Voltage Battery Charger |
| LT1513IR | 功能描述:IC BATT CHRGR CONST/PROG I/V 7DD RoHS:否 類(lèi)別:集成電路 (IC) >> PMIC - 電池管理 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 功能:電池監(jiān)控器 電池化學(xué):堿性，鋰離子，鎳鎘，鎳金屬氫化物 電源電壓:1 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:SOT-23-6 供應(yīng)商設(shè)備封裝:SOT-6 包裝:帶卷 (TR) |
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