Datasheet
Table Of Contents
- FEATURES
- APPLICATIONS
- DESCRIPTION
- ABSOLUTE MAXIMUM RATINGS
- RECOMMENDED OPERATING CONDITIONS
- ELECTRICAL CHARACTERISTICS
- TYPICAL PERFORMANCE CHARACTERISTICS
- OPERATION
- CURRENT REGULATOR OPERATION
- PROTECTION
- DESIGN PROCEDURE
- SETTING LED CURRENT CONTROL
- FIXED LED CURRENT
- ADJUSTABLE LED CURRENT
- INPUT CAPACITOR SELECTION
- RECOMMENDED OPERATING FREQUENCY AND ON TIME "TIMEON" CALCULATION
- TIMING COMPONENTS (RON and CON)
- INDUCTOR SELECTION
- POWER FET SELECTION
- DIM FET SELECTION
- BOOTSTRAP CAPACITORS
- SOFT-START CAPACITOR
- ENABLE OPERATION
- PWM DIM OPERATION
- LAYOUT CONSIDERATIONS
- APPLICATION INFORMATION
- Revision History
+
-
CSP
CSN
Gm
-
+
Gm
10 PA
SS COMP
Level
Shift
Level
Shift
T
ON
EN
DIM
PWM
Driver
V
EE
Off-Time
Comp
Programmable
ON Time
UVLO
ADJ
Thermal
Shutdown
Bootstrap
Driver
Low Side
Gate
Driver
Linear
Regulator
V
IN
CGND
BST
V
CC
HO
HS
LO
LS
BST2
DIMO
DIMR
LM3434
www.ti.com
SNVS619B –MARCH 2010–REVISED MAY 2013
PIN DESCRIPTIONS (continued)
Pin Name Function
23 CSN Current sense amplifier inverting input. Connect to current sense resistor negative terminal.
24 CSP Current sense amplifier non-inverting input. Connect to current sense resistor positive terminal.
EP V
EE
Exposed Pad on the underside of the device. Connect this pad to a PC board plane connected to V
EE
.
BLOCK DIAGRAM
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