The JTM5663 is a step-up converter designed for driving up

1.产品概述         2.产品特点
3.应用范围       4.下载产品资料PDF文档
5.产品封装图                     6.电路原理图
7.功能概述       8.相关产品

一,产品概述(General Description)
The JTM5663 is a step-up converter designed for driving up to 7 series white LEDs from a single cell Lithium lon batle . The JTM5663 uses current mode， fixed frequency architecture to regulate an LED hich is measured through an external current sense resistor. Its low 200mV feedback voltage reduces power loss and improves efficiency The JTM5663 includes under-voltage lockout，
current limiting and thermal overload protectionpreventing damage in the event of an output overload.Optimized operation frequency can meet the requirement of small LC filters value and operation current with high efficiency. Internal soft
start function can reduce the inrush curren . Tiny package type provide the best solution for PCB space saving and total BOM co

二.产品特点(Features)
1.)High Efficiency: Up to 90%
2.)1.2MHz Constant Frequency Operation
3.)Integrated internal Power MOSFET
4.)Drives up to 7 Series WLEDs
5.)Low 200mV Feedback Voltage
6.)Soft-start/Dimming with wide Frequency Range
7.)UVLO, Thermal Shutdown
8.)Internal Current limit
9.)Over Voltage Protection
10.)Small LC Filter
11.)Minimize the External Component
12.)<1µA Shutdown Current
13.)SOT23-6 Package

三,应用范围 (Applications)
Camera Flash White LED
Mobile Phone, Smart Phone LED Backlight

PDA LED Backlight
Digital Still Cameras

Camcorder

四.下载产品资料PDF文档

JTM5663

五,产品封装图 (Package)

Pin Name	Pin Number	Description
SW	1	Inductor Connection. Connect to the switched side of the external inductor as well as the anode of the external diode. SW is high impedance during shutdown.
GND	2	Ground Pin.
FB	3	Current-Sense Feedback Input. Connect a resistor from FB to GND to set the LED current: I LED=0.2V/R CS
EN	4	Enable and LED Brightness Control Input. Pull high to turn on IC.Drive EN with a 20kHz to 1MHz unfiltered PWM dimming signal for DC LED current that is proportional to the signal’s duty cycle.
OV	5	Over Voltage Input. The JTM5663 turn off the N-channel MOSFET when VUT exceeds 28V .Connect OV to the output at the top of the LED string.
VIN	6	Power Supply Input. Must be closely decoupled to GND with a 1µF or greater ceramic capacitor.

六.电路原理图

七,功能概述

PARAMETER	CONDITIONS	MIN	TYP	MAX	UNIT
Operating Input Voltage		3		24	V
Under Voltage Lockout				2.6	V
Under Voltage Lockout Hysteresis			100		mV
Current (Shutdown)	V EN<0.4V			1	µA
Quiescent Current	V FB=0.15V，No switching		200		µA
Supply Current	V FB=0V，switching		0.6	1	mA
Regulated Feedback Voltage		194	200	206	mV
Switching Frequency			1.2		MHz
ON Resistance of NMOS			0.1		Ω
Peak Current Limit	V IN= 4.2V,Duty cycle=50%	2			A
EN Shutdown Voltage				0.4	V
EN Enable Voltage		1.5			V
EN Leakage Current			±0.01	±1.0	µA
OVP Threshold	Open LED,V OUT Rising		28		V

八,相关产品

小屏白灯背光驱动IC

型号	工作模式	工作电	过压保	反馈	开关电	效率	静态	工作	调光	调光频	封装
		压范围	护电压	电压	流限制		电流	频率	形式	率范围
JTM2126	PWM	2.5V-10V	29V	0.1V	320mA	85%	0.1uA	1.3MHz	PWM		SOT-25

JTM5121A	PWM	2.2V-6.0V	17V	0.25V	400mA	82%	3mA	1.4MHz	PWM	100Hz-1KHz	SOT-26



大中屏白灯背光驱动IC

型号	工作模式	工作电	过压保	反馈	开关电	效率	静态	工作	调光	调光频	封装
		压范围	护电压	电压	流限制		电流	频率	形式	率范围
JTM5665	PWM	2.2V-6.0V	17V	0.25V	700mA	82%	3mA	1.4MHz	PWM	100Hz-1KHz	SOT-26



JTM5662	PWM	2.5V-6.0V	23V	0.25V	1.0A	88%	0.4mA	1.0MHz	PWM	100Hz-10KHz	SOT-26



JTM5666	PWM	2.5V-6.0V	30V	0.104V	400mA	87%	0.2mA	1.2MHz	PWM	小于1KHz	SOT-26



JTM5666B	PWM	2.7V-6.0V	38V	0.2V	1A	91%	5uA	0.8MHz	PWM		SOT-26


JTM9293B	PWM	2.7V-6.0V	37V	0.3V	900mA	90%	0.28mA	0.9MHz	PWM	100Hz-200KHz	SOT-26
JTM9293C	PWM	2.5V-6.0V	36V	0.3V	2A	90%	0.4mA	1MHz	PWM	100Hz-200KHz	SOT-26
JTM9284A/B/C	PWM	2.5V-6.0V	28V	0.1V/	1.5A	90%	0.1uA	1.2MHz	PWM	20KHz-1MHz	SOT-26
				0.25V/
				0.3V

JTM5663	PWM	3V-25V	28V	0.2V	2A	90%	1uA	1.2MHz	PWM	20KHz-1MHz	SOT-26



JTM5663B	PWM	2.7V-6.5V	22V	0.2V	2.8A	95%	5uA	1MHz	PWM		SOT-26




同步升压白灯背光驱动IC

型号	工作模式	工作电	过压保	反馈	开关电	效率	静态	工作	调光	调光频	封装
		压范围	护电压	电压	流限制		电流	频率	形式	率范围
JTM3019	PWM	2.7V-16V	36V	0.2V	340mA	81%	3.2uA	1.2MHz	PWM		SOT-26

我司的JTM5665/SOT-26有以下优点：

1.最大700mA输出电流，带载能力强,输出电流大.
2.反馈电压0.25V.
3.带OVP功能,最高升压17V.
4.输入电压2.2-6.0V,启动电压低.
5.可实现PWM调光.
6.工作频率可达1.4Mhz,纹波小，噪声低，对外界干扰小.
7.可实现3串13并/5串9并和单路串5灯的白灯背光应用,可应用于10-12寸屏以内的白灯背光应用.
8.封装采用金线，全测产品，一致性好，品质稳定.