LD1610
High Power LED Driver
LD1610
High Power LED Driver
Ver. 1.3 / July. 2013
This document is a general product description and is subject to change without notice.
LDT Inc. does NOT assume any responsibility for use of circuits described.
1
LDT Inc.
WE bldg. 5F, 126-33 Han-dle 1ro, Seobuk-gu, Cheonan, Chungnam, korea, 331-220
Tel. +82 41 520 7300 Fax. +82 41 520 7337
www.ldt.co.kr
Ver1.3
LD1610
High Power LED Driver
REVISION HISTORY
REV No.
1.0
1.1
Initial release
Added Items
▪
(Page 4) : ‘Power efficiency up to 95%’
▪
Insert Page13
▪
(Page 7) : Power Dissipation∙∙∙, Note[1]
▪
(Page 9) : In case, Δif = 38.6%∙∙∙
In case, Δif = 82%∙∙∙
Deleted Items
▪
(Page 10) : 10.5 Thermal considerations
1.2
Changed absolute maximum rating voltage as below
▪
(Page 7) : VIN 48VDC → 55VDC
▪
(Page 7) : VSW 48VDC → 55VDC
2013-01-25
Revision Summary
Date
2010-11-11
2011-7-28
2
LDT Inc.
WE bldg. 5F, 126-33 Han-dle 1ro, Seobuk-gu, Cheonan, Chungnam, korea, 331-220
Tel. +82 41 520 7300 Fax. +82 41 520 7337
www.ldt.co.kr
Ver1.3
LD1610
High Power LED Driver
CONTENTS
1. GENERAL DSCRIPTION
2. FEATURES
3. APPLICATIONS
4. BLOCK DIAGRAM
5. PIN DESCRIPTION
6. PIN CONFIGURATION
7. ABSOLUTE MAXIMUM RATINGS
8. ELECTRICAL CHARACTERISTICS
9. CIRCUIT DESCRIPTION
10. APPLICATION INFORMATION
11. PACKAGE INFORMATION
3
LDT Inc.
WE bldg. 5F, 126-33 Han-dle 1ro, Seobuk-gu, Cheonan, Chungnam, korea, 331-220
Tel. +82 41 520 7300 Fax. +82 41 520 7337
www.ldt.co.kr
Ver1.3
LD1610
High Power LED Driver
1. GENERAL DESCRIPTION
The LD1610 is a continuous mode inductive step-down converter, designed for driving single or
multiple series connected High Power LEDs with a minimum number of external components. It
operates from an input voltage range of 7V to 40V and provides an externally adjustable output
current up to 1.0A depending upon input voltage and external components. The LD1610 has internal
switching transistor, regulator and output current sensing circuit, which uses an external resistor to
set the nominal average output current. The LED dimming can be controlled via pulse width
modulation (PWM) through DIM pin. Additionally, to ensure the system reliability, the LD1610 has
internal thermal shutdown circuit.
2.
FEATURES
•
•
•
•
•
•
•
•
7V ~ 40V input range generates maximum 1.0A output constant current.
Regulation voltage is 4.5V.
Over temperature thermal protection
Over voltage circuit protection
External dimming control PIN
High efficiency output design
Power efficiency up to 95%
Package : 8-pin Exposed SOP
3. ORDERING INFORMATION
PART NUMBER
LD1610-SP
PACKAGE
8 SOP
Ta
-40°C to 85
°C
4.
APPLICATIONS
• MR16 lighting
• DC/DC LED driver
• Automotive lighting
• Offline LED lamps
4
LDT Inc.
WE bldg. 5F, 126-33 Han-dle 1ro, Seobuk-gu, Cheonan, Chungnam, korea, 331-220
Tel. +82 41 520 7300 Fax. +82 41 520 7337
www.ldt.co.kr
Ver1.3
LD1610
High Power LED Driver
5. BLOCK DIAGRAM
VIN
VDD
Voltage
Regulator
SW
DIM
Pulse
Generator
Control
Logic
R
DGND
AGND
Thermal
Shutdown
+
-
CS
REF
6. PIN DISCRIPTION
PIN NAME
VIN
VDD
AGND
DIM
DGND
CS
R
SW
DESCRIPTION
Input voltage (7V ~ 40V)
Internal regulator output. Connects decoupling capacitor
to this pin with 1.0uF capacitor.
Analog ground
Dimming control terminal. Connect to VDD if not used.
Digital ground
Current sense connection
Output current level setting resistor. Connects a resistor from
this pin to ground for output current setting.
Switch output terminal
PIN No.
1
2
3
4
5
6
7
8
5
LDT Inc.
WE bldg. 5F, 126-33 Han-dle 1ro, Seobuk-gu, Cheonan, Chungnam, korea, 331-220
Tel. +82 41 520 7300 Fax. +82 41 520 7337
www.ldt.co.kr
Ver1.3
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