Linear Technology Demo Circuit 1592A Quick Start Manual

DESCRIPTION
WARNING!
Do not look directly at operating LED.
This circuit produces light that can damage eyes.
Demo Circuit 1592A is a Highly Integrated Portable
Product PMIC with a pushbutton controller, two LDOs,
three buck converters, a Li-Ion battery charger, and a
power path controller featuring the LTC3577-3 and
LTC3577-4. This board utilizes a DC590B, USB to I
interface board, to control the LTC3577-3/LTC377-4
software control window.
The LTC3577-3 and LTC3577-4 are PowerPath™ man-
ager with automatic load prioritization, battery charger,
Bat-Track™ controller, push button controlled power up
PERFORMANCE SUMMARY
PARAMETER
Input Supply Range (V )
BUS
Absolute Wall Input Threshold (V
DV Operating Voltage
CC
DV UVLO (V
CC DVCC,UVLO)
V Regulated Output Voltage (V
BAT
Constant Current Mode Charge Current (I
V UVLO
OUT
V
OUT1
V
OUT2
V
OUT3
LDO1
LDO2
Full-Scale LED Current
Specifications are at T A = 25°C
CONDITIONS
) V Rising
W WALL
V Falling
WALL
) DC1592A-A (LTC3577-3)
FLOAT
DC1592A-B (LTC3577-4)
) R = 2KΩ, Input current limit = 1A
CHRG PROG
V Falling
OUT
V Rising
OUT
0 to 500mA
0 to 500mA
0 to 800mA
0 to 150mA
0 to 150mA
Demo Circuit 1592A-A/-B
QUICK START GUIDE
LTC3577-3 and LTC3577-4 LTC3577-3 AND LTC3577-4
Highly Integrated Portable
sequence and reset, and a 10 LED string controller with
gradation and PWM control. The three buck regulators
and the LED Boost controller have adjustable slew rates
for EMI reduction.
The LTC3577-3 and LTC3577-4 has a high temperature
battery voltage reduction feature that reduces the battery
voltage under high temperature conditions to improve
safety and reliability.
Refer to the LTC3577-3 and LTC3577-4 datasheet for
2
C more details on the electrical and timing specifications.
Design files for this circuit board are available. Call
the LTC factory.
L
, LTC, LTM, LT are registered trademarks of Linear Technology Corporation. PowerPath
and Bat-Track are trademarks of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
Product PMIC
MIN TYP MAX
4.35 5.5
4.3 4.45
3.1 3.2
1.6 5.5
1
4.179 4.200 4.221
4.079 4.100 4.121
465 500 535
2.5 2.7
2.8 2.9
1.8
3.3
1.2
3.3
1.2
20
UNITS
V
V
V
V
V
V
V
mA
V
V
V
V
V
V
V
mA
1