參數(shù)資料
型號： LTC3202
廠商： Linear Technology Corporation
英文描述： Low Noise, High Efficiency Charge Pump for White LEDs
中文描述： 低噪聲，高效率電荷泵白光LED
文件頁數(shù)： 1/12頁
文件大?。?/td> 249K
代理商： LTC3202
1
LTC3202
3202fa
APPLICATIU
FEATURES
DESCRIPTIOU
TYPICAL APPLICATIOU
I
White LED Backlighting
I
Programmable Boost Current Source
I
Low Noise Constant Frequency Operation
I
25% Less Input Current Than Doubler Charge Pump
I
High Output Current: Up To 125mA
I
Small Application Circuit
I
Regulated Output Voltage or Current
I
Automatic Soft-Start
I
V
IN
Range: 2.7V to 4.5V
I
No Inductors
I
1.5MHz Switching Frequency
I
I
CC
< 1
μ
A in Shutdown
I
Available in 10-Pin MSOP and 3mm
×
3mm
DFN Packages
Low Noise, High Efficiency
Charge Pump for White LEDs
The LTC
3202 is a low noise, constant frequency charge
pump DC/DC converter that uses fractional conversion to
increase efficiency in white LED applications. The part can
be used to produce a regulated voltage or current of up to
125mA from a 2.7V to 4.5V input. Low external parts count
(two flying capacitors and two small bypass capacitors at
V
IN
and V
OUT
) make the LTC3202 ideally suited for small,
battery-powered applications.
An internal 2-bit DAC allows LED current to be adjusted for
LED brightness control. The LTC3202 also has thermal
shutdown protection and can survive a continuous short-
circuit from V
OUT
to GND. Built-in soft-start circuitry
prevents excessive inrush current during start-up. High
switching frequency enables the use of small external
capacitors. A low current shutdown feature disconnects
the load from V
IN
and reduces quiescent current to less
than1
μ
A.
The LTC3202 is available in the 10-pin MSOP and 3mm
×
3mm DFN packages.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Programmable White LED Power Supply
3202 TA01
LTC3202
V
OUT
FB
GND
C4
1
μ
F
C1
1
μ
F
5, 11
3
2
C2
–
C2
+
C1
–
C1
+
D0
CURRENT
PROGRAMMING
V
IN
3V TO 4.5V
10
4
1
36
36
36
36
36
36
C3
1
μ
F
C2
1
μ
F
D1
V
IN
8
7
9
6
C1, C2, C3, C4 = MURATA GRM 39X5R105K6.3 OR TAIYO YUDEN JMK107BJ105MA
0mA TO 125mA
TOTAL CURRENT
V
IN
(AC COUPLED)
20mV/DIV
V
(AC COUPLED)
20mV/DIV
500ns/DIV
V
IN
= 3.6V
C
IN
= C
= 1
μ
F
I
OUT
= 60mA
3202 G09
Input and Output Ripple
相關PDF資料
PDF描述
LTC3202EDD Low Noise, High Efficiency Charge Pump for White LEDs
LTC3202EMS Low Noise, High Efficiency Charge Pump for White LEDs
LTC3401 1A, 3MHz Micropower Synchronous Boost Converter
LTC3401EMS 1A, 3MHz Micropower Synchronous Boost Converter
LTC3402 4A, 2MHz Dual Phase Step-Up DC/DC Converter in 3mm 3mm DFN
相關代理商/技術參數(shù)
參數(shù)描述
LTC3202EDD 功能描述:IC LED DRIVR WHITE BCKLGT 10-DFN RoHS:否 類別:集成電路 (IC) >> PMIC - LED 驅動器 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 恒定電流:- 恒定電壓:- 拓撲:升壓（升壓），切換式電容器（充電泵） 輸出數(shù):1 內部驅動器:是 類型 - 主要:背光 類型 - 次要:白色 LED 頻率:625kHz ~ 875kHz 電源電壓:2.7 V ~ 5.3 V 輸出電壓:5V 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬） 供應商設備封裝:10-µMAX 包裝:帶卷 (TR) 工作溫度:-40°C ~ 85°C
LTC3202EDD#PBF 功能描述:IC LED DRIVR WHITE BCKLGT 10-DFN RoHS:是 類別:集成電路 (IC) >> PMIC - LED 驅動器 系列:- 標準包裝:60 系列:- 恒定電流:- 恒定電壓:- 拓撲:線性（LDO），PWM，升壓（升壓） 輸出數(shù):8 內部驅動器:是 類型 - 主要:背光 類型 - 次要:RGB，白色 LED 頻率:500kHz ~ 1.5MHz 電源電壓:4.75 V ~ 26 V 輸出電壓:45V 安裝類型:* 封裝/外殼:* 供應商設備封裝:* 包裝:* 工作溫度:-40°C ~ 85°C
LTC3202EDD#TR 功能描述:IC LED DRIVR WHITE BCKLGT 10-DFN RoHS:否 類別:集成電路 (IC) >> PMIC - LED 驅動器 系列:- 標準包裝:6,000 系列:- 恒定電流:- 恒定電壓:- 拓撲:開路漏極，PWM 輸出數(shù):4 內部驅動器:是 類型 - 主要:LED 閃爍器 類型 - 次要:- 頻率:400kHz 電源電壓:2.3 V ~ 5.5 V 輸出電壓:- 安裝類型:表面貼裝 封裝/外殼:8-VFDFN 裸露焊盤 供應商設備封裝:8-HVSON 包裝:帶卷 (TR) 工作溫度:-40°C ~ 85°C 其它名稱:935286881118PCA9553TK/02-TPCA9553TK/02-T-ND
LTC3202EDD#TRPBF 功能描述:IC LED DRIVR WHITE BCKLGT 10-DFN RoHS:是 類別:集成電路 (IC) >> PMIC - LED 驅動器 系列:- 標準包裝:6,000 系列:- 恒定電流:- 恒定電壓:- 拓撲:開路漏極，PWM 輸出數(shù):4 內部驅動器:是 類型 - 主要:LED 閃爍器 類型 - 次要:- 頻率:400kHz 電源電壓:2.3 V ~ 5.5 V 輸出電壓:- 安裝類型:表面貼裝 封裝/外殼:8-VFDFN 裸露焊盤 供應商設備封裝:8-HVSON 包裝:帶卷 (TR) 工作溫度:-40°C ~ 85°C 其它名稱:935286881118PCA9553TK/02-TPCA9553TK/02-T-ND
LTC3202EMS 功能描述:IC LED DRVR WHITE BCKLGT 10-MSOP RoHS:否 類別:集成電路 (IC) >> PMIC - LED 驅動器 系列:- 標準包裝:6,000 系列:- 恒定電流:- 恒定電壓:- 拓撲:開路漏極，PWM 輸出數(shù):4 內部驅動器:是 類型 - 主要:LED 閃爍器 類型 - 次要:- 頻率:400kHz 電源電壓:2.3 V ~ 5.5 V 輸出電壓:- 安裝類型:表面貼裝 封裝/外殼:8-VFDFN 裸露焊盤 供應商設備封裝:8-HVSON 包裝:帶卷 (TR) 工作溫度:-40°C ~ 85°C 其它名稱:935286881118PCA9553TK/02-TPCA9553TK/02-T-ND
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