The JTMX8912 is a monolithic high voltage switching regulato

1.产品概述 2.产品特点 3.应用范围 4.技术规格书下载（产品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 JTMX8912 is a monolithic high voltage switching regulator with
PFM that is specifically designed to operate from a 12V~80V DC power
supply.
The JTMX8912 is a high efficiency LED driver switching regulator.
The LED string is driven at DC constant current rather than constant
voltage, thus providing constant light output and enhanced reliability.
二.产品特点(Features)

Operation Voltage DC 12V~80V.
0.1V current sense voltage reference.
Directly drive 1~18 Series 1W/3W LED.
Excellent line and load regulation.
Internal Optimize Power HV-MOSFET.
Built in Thermal Shutdown Function.
Built in Current Limiting Function.
Built in Soft-Start Circuit.
Available in TO263-5L package.
Up to 98% efficiency.
三,应用范围 (Applications)

LED Lighting & LED LAMP
General purpose LED lighting
四.技术规格书下载（产品PDF）

JTMX8912

五,产品封装图 (Package)

Pin Number	Pin Name	Description
1	START	Internal soft start Pin.
2	VREG	Internal Voltage Regulation Pin. (The VREG is about 8V)
3	VIN	Input high voltage Pin. (Operation voltage 12V~80V)
4	CSN	Current Sense Negative Pin.
5	CSP	Current Sense Positive Pin. (The current sense voltage is 0.1V)

六.电路原理图

七,功能概述

Parameter	Symbol	Value	Unit
Input Voltage	Vin	-0.3 to 90	V
Power Dissipation	PD	Internally limited	mW
Thermal Resistance (TO263-5L) (Junction to Ambient, No Heatsink, Free Air)	RJA	30	ºC/W
Operating Junction Temperature	TJ	-40 to 125	ºC
Storage Temperature	TSTG	-65 to 150	ºC
Lead Temperature (Soldering, 10 sec)	TLEAD	260	ºC
ESD (HBM)		>3000	V

八,相关芯片选择指南

产品型号	输入电压	最大输出电压	输出电流	开关频率	恒流设置	封装形式
JTMX8912	12V ~ 80V	1~18LED串	1A	PFM	Adj (0.1V)	TO263-5L
JTMX8913	24V ~ 80V	3~14LED串	1A	PFM	Adj (0.2V)	TO252-5L
JTMX8915	24V ~ 100V	3~8LED串	0.5A	PFM	Adj (0.2V)	SOP8L

(责任编辑：oumao18)