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參數(shù)資料
| 型號： | LT3468-1 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | Photoflash Capacitor Charger in ThinSOT |
| 中文描述： | 照相閃光燈電容充電器采用ThinSOT |
| 文件頁數(shù)： | 1/12頁 |
| 文件大?。?/td> | 302K |
| 代理商： | LT3468-1 |
LT3468/LT3468-1
Photoflash Capacitor
Charger in ThinSOT
TM
1
34681i
TYPICAL APPLICATIO S
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
Final Electrical Specifications
I
Digital / Film Camera Flash
I
PDA / Cell Phone Flash
I
Emergency Strobe
I
Highly Integrated IC Reduces Solution Size
I
Uses Small Transformers:
5.8mm
×
5.8mm
×
3mm
I
Fast Photoflash Charge Times:
4.6s for LT3468 (0V to 320V, 100
μ
F, V
IN
= 3.6V)
5.5s for LT3468-1 (0V to 320V, 50
μ
F, V
IN
= 3.6V)
I
Controlled Input Current:
500mA (LT3468)
225mA (LT3468-1)
I
Supports Operation from Single Li-Ion Cell, or Any
Supply from 2.5V up to 16V
I
Adjustable Output Voltage
I
No Output Voltage Divider Needed
I
Charges Any Size Photoflash Capacitor
I
Low Profile (1mm) SOT-23 Package
APPLICATIOU
FEATURES
DESCRIPTIO
U
October 2003
The LT
3468/LT3468-1 are highly integrated ICs designed
to charge photoflash capacitors in digital and film cam-
eras. A new control technique* allows for the use of
extremely small transformers. Each device contains an
on-chip high voltage NPN power switch. Output voltage
detection* is completely contained within the device,
eliminating the need for any discrete zener diodes or
resistors. The output voltage can be adjusted by simply
changing the turns ratio of the transformer. The LT3468
has a primary current limit of 1.4A while the LT3468-1 has
a 0.7A limit. These different current limit levels result in
well controlled input currents of 500mA for the LT3468
and 225mA for the LT3468-1. Aside from the differing
current limit, the two devices are otherwise equivalent.
The CHARGE pin gives full control of the part to the user.
Driving CHARGE low puts the part in shutdown. The DONE
pin indicates when the part has completed charging. The
LT3468 series of parts are housed in tiny low profile
(1mm) SOT-23 packages.
, LTC and LT are registered trademarks of Linear Technology Corporation.
ThinSOT is a trademark of Linear Technology Corporation. *U.S. Patent # 6, 518, 733
DANGER HIGH VOLTAGE – OPERATION BY HIGH VOLTAGE TRAINED PERSONNEL ONLY
Figure 1. LT3468 Photoflash Charger Uses
High Efficiency 4mm Tall Transformer
LT3468
CHARGE
GND
V
IN
SW
+
DONE
DONE
CHARGE
C1
4.7
μ
F
R1
100k
T1
1:10.2
COUT
PHOTOFLASH
CAPACITOR
VIN
2.5V TO 8V
D2
320V
D1
1
2
4
5
C1: 4.7
μ
F, X5R OR X7R, 10V
T1: KIJIMA MUSEN PART# SBL-5.6-1, L
= 10
μ
H, N = 10.2
D1: VISHAY GSD2004S DUAL DIODE CONNECTED IN SERIES
D2: ZETEX ZHCS400 OR EQUIVALENT
R1: PULL UP RESISTOR NEEDED IF DONE PIN USED
3468 TA01
Figure 2. LT3468-1 Photoflash Charger Uses
High Efficiency 3mm Tall Transformer
LT3468-1
CHARGE
GND
V
IN
SW
+
DONE
DONE
CHARGE
C1
4.7
μ
F
R1
100k
T1
1:10.2
COUT
PHOTOFLASH
CAPACITOR
VIN
2.5V TO 8V
D2
320V
D1
4
3
5
6
C1: 4.7
μ
F, X5R OR X7R, 10V
T1: KIJIMA MUSEN PART# SBL-5.6S-1, L
= 24
μ
H, N = 10.2
D1: VISHAY GSD2004S DUAL DIODE CONNECTED IN SERIES
D2: ZETEX ZHCS400 OR EQUIVALENT
R1: PULL UP RESISTOR NEEDED IF DONE PIN USED
3468 TA02
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT3468-2 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Photoflash Capacitor Chargers in ThinSOT |
| LT3468ES5 | 制造商:Linear Technology 功能描述:Photo Flash Charger 5-Pin TSOT-23 制造商:Linear Technology 功能描述:SPECIALTY ANALOG CIRCUIT, PDSO5 |
| LT3468ES5#PBF | 制造商:Linear Technology 功能描述:Photo Flash Charger 5-Pin TSOT-23 |
| LT3468ES5#TR | 功能描述:IC PHOTOFLASH CAP CHRGR TSOT23-5 RoHS:否 類別:集成電路 (IC) >> PMIC - 電源管理 - 專用 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 應(yīng)用:手持/移動設(shè)備 電流 - 電源:- 電源電壓:3 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:14-LLP-EP（4x4） 包裝:Digi-Reel® 配用:LP3905SD-30EV-ND - BOARD EVALUATION LP3905SD-30 其它名稱:LP3905SD-30DKR |
| LT3468ES5#TRM | 功能描述:IC PHOTOFLASH CAP CHRGR TSOT23-5 RoHS:否 類別:集成電路 (IC) >> PMIC - 電源管理 - 專用 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 應(yīng)用:手持/移動設(shè)備 電流 - 電源:- 電源電壓:3 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:14-LLP-EP（4x4） 包裝:Digi-Reel® 配用:LP3905SD-30EV-ND - BOARD EVALUATION LP3905SD-30 其它名稱:LP3905SD-30DKR |
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