The JTM3348is a step-up DC/DC converter wit a constant curre

1.产品概述         2.产品特点
3.应用范围    4.产品封装图
5.电路原理图             6.产品PCB
7.产品BOM 8.产品PDF文档
9.功能概述 10.相关产品

一,产品概述(General Description)

The JTM3348is a step-up DC/DC converter wit a constant current to drive white LEDs or similar.

The device can drive up to eight LEDs in series from a Li-Ion cell. The LED current is set by the external resistor (RSET) and is directly regulated
by the feedback (FB) voltage (typ: 200mV) across the external resistor RSET.
To ensure maximum safety during operation, the output has integrated overvoltage protection that prevents damage to the device in case of some fault conditions. The OVP voltage can be programmed by two external resistors.

The JTM3348 is available in a tiny SOP8/PP package.

二.产品特点(Features)

Input Voltage Range: 2.2V to 6V
Programmable LED Current
Drives LEDs up to 26V
Switching Frequency: up to 800kHz
Wide Dimming Frequency Range: 20kHz to 360kHz
Programmable Overvoltage Protection
Tiny SOP8/PP Package

三,应用范围 (Applications)
Handheld Devices
MP3 Players
GPS Receivers
PDA
Cellular Phones
四,产品封装图 (Package)

PIN	NAME	FUNCTION
1	OVP	Overvoltage Protection Pin
2	VIN	Input Supply Pin
3,4,9	SW	Switch Output Pin
5,6	GND	Ground
7	FB	Feedback Pin
8	EN	ON/OFF Control (High Enable)

五,电路原理图

六, 产品PCB
(略)
七.产品BOM
(略)
八.产品PDF文档

jtm3348

九,功能概述

Supply Voltage………………………………………………………………….……………………….... 7V
SW Voltage…………………………………………………………………………………………….... 30V
FB Voltage…………………………………………………………………….. …………………….... 7V
EN Voltage……………………………………………………………………….. …………………….... 7V
OVP Voltage…………………………………………………………………….. …………………….... 7V
Operating Temperature Range (Note 2) ………………………………………………–40℃ ～ +85℃
Maximum Junction Temperature…………………………………………………….……………..+150℃
Storage Temperature Range …………………………………………………………−65℃ ～ +150℃
Lead Temperature (Soldering, 10 sec)... ………………………………………………............... +265℃

Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device.
Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime.

Note 2: The H

is guaranteed to meet performance specifications from 0℃ to 85℃. Specifications over the –40℃

to 85℃ operating temperature range are assured by design, characterization and correlation with statistical process
controls.

十,相关产品

隆压型LED射灯驱动IC

型号	工作电压范围	输出电流	输出电	线性	效率	工作频率	调光功能	封装	替代型号
型号	工作电压范围	输出电流	流精度	调整率	效率	工作频率	调光功能	封装	替代型号
JTM4115	6.0V-40V	1.2A	3%	1.50%	98%	1MHz(max)	PWM调光	SOT89-5	PT4115/PAM2861/SN3350/CL6808
JTM4115ES	6.0V-40V	1.2A	3%	1.50%	98%	1MHz(max)	PWM调光	ESOP8	PT4115/PAM2861/2/PT4205
JTM4115MR	6.0V-40V	1.2A	3%	1.50%	98%	1MHz(max)	PWM调光	SOT-26	ZXLD1350/ZXLD1360/PT4211
JTM2806	2.0V-6.5V	800mA	10.00%	0.45%	92%	1.4 MHz	PWM调光	SOT-25	PAM2804
JTM1350	5.5V-36V	2.5A	1%		96%	1MHz	PWM调光	SOT-26
JTM9911	2.5V-100V	2.5A	1%		90%	1MHz	PWM调光	SOT-26	MH6206
JTM6103	6.0V-100V	3A	3%		95%	200KHz	PWM调光	SOT-26
JTM4101	8V-45V	3A	3%		95%	220KHz		ESOP8
JTM4103	8V-40V	4A	3%		95%	220KHz	PWM调光	TO252-5L
JTM4105	8V-40V	5A	3%		95%	220KHz		TO263-5L
JTM3106	5.0V-36V	1.5A	2%		96%	380KHz	PWM调光	SOP-8
JTM3101	4.5V-45V	2A	2%		83%	150KHz	PWM调光	ESOP8
JTM3102	8V-45V	3A	2%		89%	150KHz		ESOP8
JTM3109	8V-40V	3A	2%		89%	180KHz		SOP8
JTM3108	8V-40V	3.5A	2%		87%	180KHz	PWM调光	ESOP8
JTM3112	8V-40V	2A	2%		89%	110KHz		SOP8
JTM3113B	7V-40V	2.5A	2%		89%	250KHz		ESOP8
JTM3115	8V-40V	5A	2%		86%	150KHz		TO263-5L