Texas Instruments LM3404 Evaluation Boards LM3404FSTDIMEV/NOPB LM3404FSTDIMEV/NOPB 사용자 설명서
제품 코드
LM3404FSTDIMEV/NOPB
SW
1
RON
2
VIN
3
BOOT
4
VCC
8
GND
7
DIM
6
CS
5
SW
1
RON
2
VIN
3
BOOT
4
VCC
8
GND
7
DIM
6
CS
5
DAP
SNVS465F – OCTOBER 2006 – REVISED MAY 2013
Connection Diagrams
Figure 1. 8-Lead Plastic SOIC-8 Package
Figure 2. 8-Lead Plastic So PowerPAD-8 Package
PIN DESCRIPTIONS
Pin(s)
Name
Description
Application Information
1
SW
Switch pin
Connect this pin to the output inductor and Schottky diode.
2
BOOT
MOSFET drive bootstrap pin
Connect a 10 nF ceramic capacitor from this pin to SW.
3
DIM
Connect a logic-level PWM signal to this pin to enable/disable the power
Input for PWM dimming
MOSFET and reduce the average light output of the LED array.
4
GND
Ground pin
Connect this pin to system ground.
5
CS
Set the current through the LED array by connecting a resistor from this pin to
Current sense feedback pin
ground.
6
RON
On-time control pin
A resistor connected from this pin to VIN sets the regulator controlled on-time.
7
VCC
Output of the internal 7V linear
Bypass this pin to ground with a minimum 0.1 µF ceramic capacitor with X5R or
regulator
X7R dielectric.
8
VIN
Nominal operating input range for this pin is 6V to 42V (LM3404) or 6V to 75V
Input voltage pin
(LM3404HV).
DAP
GND
Thermal Pad
Connect to ground. Place 4-6 vias from DAP to bottom layer ground plane.
2
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