Texas Instruments LM3433 Evaluation Board LM3433SQ-14AEV/NOPB LM3433SQ-14AEV/NOPB 数据表
产品代码
LM3433SQ-14AEV/NOPB
LM3433
HS
HO
BST
V
CC
LO
L
S
C
SP
C
SN
BST
2
D
MO
D
IMR
V
EE
C
O
MP
SS
T
ON
ADJ
EN
DIM
V
IN
C
G
N
D
0.47
P
F
2.2
P
F
0.01
P
F
-12V
GND
4.7
P
F
+3.3V
DIM
44.2k
0.1
P
F
ADJ
-12V
270 pF
22
P
F
6
P
H
0.01
LED CATHODE
LED ANODE
LED
EN
Q1
Q2
Q3
SNVS535C – OCTOBER 2007 – REVISED MAY 2013
LM3433 Common Anode Capable High Brightness LED Driver
with High Frequency Dimming
Check for Samples:
1
FEATURES
DESCRIPTION
The LM3433 is an adaptive constant on-time DC/DC
2
•
Operating Input Voltage Range of -9V to -14V
buck (step-down) constant current controller (a true
w.r.t. LED Anode
current source). The LM3433 provides a constant
•
Control Inputs Referenced to the LED Anode
current for illuminating high power LEDs. The output
•
Output Current Greater than 6A
configuration allows the anodes of multiple LEDs to
be tied directly to the ground referenced chassis for
be tied directly to the ground referenced chassis for
•
Greater than 30kHz PWM Frequency Capable
maximum heat sink efficacy. The high frequency
•
Negative Output Voltage Capability Allows
capable architecture allows the use of small external
LED Anode to be Tied Directly to Chassis for
passive components and no output capacitor while
Maximum Heat Sink Efficacy
maintaining low LED ripple current. Two control
inputs are used to modulate LED brightness. An
inputs are used to modulate LED brightness. An
•
No Output Capacitor Required
analog current control input is provided so the
•
Up to 1MHz Switching Frequency
LM3433 can be adjusted to compensate for LED
•
Low I
Q
, 1mA Typical
manufacturing variations and/or color temperature
•
Soft Start
correction. The other input is a logic level PWM
control of LED current. The PWM functions by
control of LED current. The PWM functions by
•
Adaptive Programmable ON Time Allows for
shorting out the LED with a parallel switch allowing
Constant Ripple Current
high PWM dimming frequencies. High frequency
•
24-pin WQFN Package
PWM
dimming
allows
digital
color
temperature
control,
interference
blanking,
field
sequential
APPLICATIONS
illumination,
and
brightness
control.
Additional
features include thermal shutdown, V
CC
under-voltage
•
LCD Backlighting
lockout, and logic level shutdown mode. The LM3433
•
Projection Systems
is available in a low profile 24-pin WQFN package.
•
Solid State Lighting
•
Automotive Lighting
TYPICAL APPLICATION CIRCUIT
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2007–2013, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.