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LT3475EFE-1#TRPBF: 产品描述IC LED DRIVER RGLTR DIM 20TSSOP; 产品类别模拟混合信号IC 驱动程序和接口; 文件大小142KB，共4页; 制造商Linear ( ADI ); 官网地址http://www.analog.com/cn/index.html; 标准

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LT3475EFE-1#TRPBF概述

IC LED DRIVER RGLTR DIM 20TSSOP

LT3475EFE-1#TRPBF规格参数

参数名称	属性值
Brand Name	Linear Technology
是否Rohs认证	符合
厂商名称	Linear ( ADI )
零件包装代码	TSSOP
包装说明	HTSSOP,
针数	20
制造商包装代码	FE
Reach Compliance Code	compliant
ECCN代码	EAR99
接口集成电路类型	LED DISPLAY DRIVER
JESD-30 代码	R-PDSO-G20
JESD-609代码	e3
长度	6.5 mm
湿度敏感等级	1
复用显示功能	NO
功能数量	2
区段数	1
端子数量	20
最高工作温度	85 °C
最低工作温度	-40 °C
封装主体材料	PLASTIC/EPOXY
封装代码	HTSSOP
封装形状	RECTANGULAR
封装形式	SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH
峰值回流温度（摄氏度）	260
认证状态	Not Qualified
座面最大高度	1.2 mm
最大供电电压	36 V
最小供电电压	4 V
标称供电电压	12 V
表面贴装	YES
温度等级	INDUSTRIAL
端子面层	Matte Tin (Sn)
端子形式	GULL WING
端子节距	0.65 mm
端子位置	DUAL
处于峰值回流温度下的最长时间	30
宽度	4.4 mm

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QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1315

DUAL STEP-DOWN 1.5A LED DRIVER

LT3475-1

DESCRIPTION

Demonstration circuit 1315 features the

LT®3475-1 dual step-down 1.5A LED driver in a

16-lead TSSOP thermally enhanced package.

The demonstration circuit is designed to drive

two 1.5A LED strings (one on each channel)

from a high input voltage. The high switching

frequency scheme permits the use of a small

inductor and ceramic capacitors to save space

and cost. The current mode PWM control

scheme provides fast transient response and

cycle-by-cycle current limiting. DC1315 is

specifically designed for high power LED

applications such as automotive and avionic

lighting, architectural detail lighting and display

backlighting. See the LT3475-1 datasheet for

more detailed information on LED brightness

and dimming control using both the PWM pin

function and the V

ADJ

pin function. The PWM

terminals can be used to dim the LEDs with the

addition of a PWM MOSFET and the resistor-

short connection from LED- to GND removed.

The efficiency of DC1315A with 20V input and 4

white LEDs on each 1.5A channel is 91.5%.

The input voltage is limited to 30V during

startup. During normal (non-startup) operation,

the input voltage can be as high as 36V.

DC1315 allows LED string voltages up to 23V.

However, some combinations of VIN, VLED,

and ILED can result in the LT3475-1 getting hot.

Please consult the datasheet for thermal calcu-

lations and details. The voltages, the LED cur-

rent, and the switching frequency can be ad-

justed for optimal thermal performance.

NOTE:

Design files for this circuit board are avail-

able. Call the LTC factory.

LT is a registered trademark of Linear Technology Corporation

QUICK START PROCEDURE

DC1315 is easily set up for evaluating the

LT3475-1 dual step-down 1.5A LED driver

circuit. Follow the test procedure outlined below

and see Figure 1.

1. Connect a bench supply with power OFF

to the V

and GND terminals.

2. Connect a 1.5A LED string with forward

voltage >13V to the LED1+ and LED1-

terminals.

3. Connect a 1.5A LED string with forward

voltage >13V to the LED2+ and LED2-

terminals.

The boost circuitry on DC1315 is de-

signed to work best with VLED >13V since

there is a 9V zener diode limiting the boost

voltage. If lower voltage LED strings are re-

quired, please lower the voltage of the zener

NOTE:

diode or use another boost method. Please

see the datasheet for details.

4. Turn on the input power supply and set

the voltage above the LED string voltage

and below 30V.

5. Observe the LEDs working properly at

1.5A without looking straight at the LEDs.

The brightness is harmful to the eye.

LT3475EFE-1#TRPBF相似产品对比

	LT3475EFE-1#TRPBF	DC1315A	LT3475IFE#TRPBF	LT3475IFE-1#TRPBF	LT3475EFE#TRPBF	LT3475IFE-1#PBF	LT3475IFE#PBF	LT3475EFE-1#PBF
描述	IC LED DRIVER RGLTR DIM 20TSSOP	eval board led driver lt3475-1	IC LED DRIVER RGLTR DIM 20TSSOP	IC LED DRIVER RGLTR DIM 20TSSOP	IC LED DRIVER RGLTR DIM 20TSSOP	IC LED DRIVER RGLTR DIM 20TSSOP	IC LED DRIVER RGLTR DIM 20TSSOP	IC LED DRIVER RGLTR DIM 20TSSOP
Brand Name	Linear Technology	-	Linear Technology	Linear Technology	Linear Technology	Linear Technology	Linear Technology	Linear Technology
是否Rohs认证	符合	-	符合	符合	符合	符合	符合	符合
厂商名称	Linear ( ADI )	-	Linear ( ADI )	Linear ( ADI )	Linear ( ADI )	Linear ( ADI )	Linear ( ADI )	Linear ( ADI )
零件包装代码	TSSOP	-	TSSOP	TSSOP	TSSOP	TSSOP	TSSOP	TSSOP
包装说明	HTSSOP,	-	HTSSOP,	HTSSOP,	HTSSOP,	HTSSOP,	HTSSOP,	HTSSOP,
针数	20	-	20	20	20	20	20	20
制造商包装代码	FE	-	FE	FE	FE	FE	FE	FE
Reach Compliance Code	compliant	-	compliant	compliant	compliant	compliant	compliant	compliant
ECCN代码	EAR99	-	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99
接口集成电路类型	LED DISPLAY DRIVER	-	LED DISPLAY DRIVER	LED DISPLAY DRIVER	LED DISPLAY DRIVER	LED DISPLAY DRIVER	LED DISPLAY DRIVER	LED DISPLAY DRIVER
JESD-30 代码	R-PDSO-G20	-	R-PDSO-G20	R-PDSO-G20	R-PDSO-G20	R-PDSO-G20	R-PDSO-G20	R-PDSO-G20
JESD-609代码	e3	-	e3	e3	e3	e3	e3	e3
长度	6.5 mm	-	6.5 mm	6.5 mm	6.5 mm	6.5 mm	6.5 mm	6.5 mm
湿度敏感等级	1	-	1	1	1	1	1	1
复用显示功能	NO	-	NO	NO	NO	NO	NO	NO
功能数量	2	-	2	2	2	2	2	2
区段数	1	-	1	1	1	1	1	1
端子数量	20	-	20	20	20	20	20	20
最高工作温度	85 °C	-	125 °C	125 °C	85 °C	125 °C	125 °C	85 °C
最低工作温度	-40 °C	-	-40 °C	-40 °C	-40 °C	-40 °C	-40 °C	-40 °C
封装主体材料	PLASTIC/EPOXY	-	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY
封装代码	HTSSOP	-	HTSSOP	HTSSOP	HTSSOP	HTSSOP	HTSSOP	HTSSOP
封装形状	RECTANGULAR	-	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR
封装形式	SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH	-	SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH	SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH	SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH	SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH	SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH	SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH
峰值回流温度（摄氏度）	260	-	260	260	260	260	260	260
认证状态	Not Qualified	-	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified
座面最大高度	1.2 mm	-	1.2 mm	1.2 mm	1.2 mm	1.2 mm	1.2 mm	1.2 mm
最大供电电压	36 V	-	36 V	36 V	36 V	36 V	36 V	36 V
最小供电电压	4 V	-	4 V	4 V	4 V	4 V	4 V	4 V
标称供电电压	12 V	-	12 V	12 V	12 V	12 V	12 V	12 V
表面贴装	YES	-	YES	YES	YES	YES	YES	YES
温度等级	INDUSTRIAL	-	AUTOMOTIVE	AUTOMOTIVE	INDUSTRIAL	AUTOMOTIVE	AUTOMOTIVE	INDUSTRIAL
端子面层	Matte Tin (Sn)	-	Matte Tin (Sn)	Matte Tin (Sn)	Matte Tin (Sn)	Matte Tin (Sn)	Matte Tin (Sn)	Matte Tin (Sn)
端子形式	GULL WING	-	GULL WING	GULL WING	GULL WING	GULL WING	GULL WING	GULL WING
端子节距	0.65 mm	-	0.65 mm	0.65 mm	0.65 mm	0.65 mm	0.65 mm	0.65 mm
端子位置	DUAL	-	DUAL	DUAL	DUAL	DUAL	DUAL	DUAL
处于峰值回流温度下的最长时间	30	-	30	30	30	30	30	30
宽度	4.4 mm	-	4.4 mm	4.4 mm	4.4 mm	4.4 mm	4.4 mm	4.4 mm

LT3475EFE-1#TRPBF

LT3475EFE-1#TRPBF概述

LT3475EFE-1#TRPBF规格参数

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