DC1319B-A Linear Technology, DC1319B-A Datasheet - Page 2

• Manufacturer Part Number: DC1319B-A
• Description: BOARD EVAL LED DRIVER LT3756
• Manufacturer: Linear Technology

Specifications of DC1319B-A

• Current - Output / Channel: 500mA
• Outputs And Type: 1, Non-Isolated
• Voltage - Output: 100V
• Features: Dimmable
• Voltage - Input: 8 ~ 80V
• Utilized Ic / Part: LT3756
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: DC1319A-A; DC1319A-A

Table 1.
QUICK START PROCEDURE
Demonstration circuit 1319A-A, 1319A-B is easy to
set up to evaluate the performance of the LT3756,
LT3756-1. Follow the procedure below:
NOTE:
not used, connect PWM to a 5V source or to IntVcc
on the PCB using resistor R21.
1.
2.
3.
PARAMETER
Input Voltage PVIN Range
Switching Frequency
I
Open LED Voltage
Efficiency
Under Voltage Lockout
Peak Switch Current Limit
LED
Connect a string of LEDs with forward voltage
less than 80V, but greater than the PVIN voltage,
to the LED+ and LED- (Boost) terminals on the
PCB as shown in Figure 1.
Connect the shutdown terminal to GND.
With power off, connect the PVIN power supply
to the PVIN and GND terminals within the ranges
PWM must be pulled high to work. If PWM is
QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1319A-A, 1319A-B
Typical Performance Summary for DC1319A-A/B
RS1 = 0.015
CONDITION
Operating
R8 = 37.4k
PVIN=12V V
4.
5.
6.
7.
8.
9.
LED
specified on the PCB. Make sure that the PVIN
DC input voltage does not exceed 80V or the
forward voltage of the LED string.
Connect the PWM terminal. If PWM is not used,
connect PWM to a 5V source or to IntVcc on the
PCB using resistor R21. PWM must be pulled
high to work. For –B, the SYNC input can be left
floating.
Turn the PVIN power supply on.
Release the shutdown/GND connection.
Observe the LED string running at the pro-
grammed LED current.
For PWM dimming, connect a PWM 100Hz or
higher signal to the PWM terminal.
Observe the reduction of brightness in the LED
string when PWM dimming.
=80V I
HIGH VOLTAGE LED CONTROLLER
LED
=0.5A
VALUE (TYPICAL)
8V-80V
300kHz
0.5A
92V
91%
8V
6.6A
2