Texas Instruments Evaluation Module for Single-Chip Charger and DC/DC Converter IC for Portable Applications BQ25017EVM BQ25017EVM 데이터 시트
제품 코드
BQ25017EVM
www.ti.com
Power
Supply #1
bqHYBRID
EVM
BAT+
(J4)
BAT–
I
o
R
12
0.5 W
0.5 W
L
W
5
50 W
W
SYS
(J3)
USB
Computer
AC
(J1)
(J1)
EN
Power
Supply #2
Current
Meter
B0235-01
2.3
PROCEDURE
Power
Supply #1
bqHYBRID
EVM
BAT+
(J4)
BAT–
I
o
R
12
0.5 W
0.5 W
L
W
5
50 W
W
SYS
(J3)
AC
(J1)
(J1)
EN
Power
Supply #2
Current
Meter
B0235-02
PROCEDURE
Figure 2-1. Original Test Setup (Setup A)
1. Make sure the
steps are followed. Turn on power supply #2. Then turn on the
computer.
2. USB Input Precharge. Verify output voltage, BAT+, is about 2 VDC. Verify the red LED (D3) and
green LED (D2) are lit while the green LED (D4) is off. Verify I
O
, the output current from BAT+, is
between 40 mA and 60 mA.
3. USB Input Fast Charge. Increase the output voltage of power supply #2 slowly to 3.5 V. Verify the red
LED (D3) is on and the green LEDs (D2 and D4) are off. Verify I
O
is between 80 mA and 120 mA.
Verify the voltage of SYS (J3) is below 100 mV.
4. USB Input Sleep Mode. Increase the output voltage of power supply #2 slowly to 6 V. Verify both the
red LED (D3) and the green LED (D2) are off.
5. AC Adapter Input Precharge. Reduce the output voltage of power supply #2 slowly to 2 V. Turn on
power supply #1. Verify output voltage, BAT+, is about 2 VDC. Verify all the three LEDs (D3, D2, D4)
are lit. Verify I
are lit. Verify I
O
, the output current from BAT+, is between 40 mA and 60 mA.
6. Disconnect USB cable from J2. Make sure the setup has been changed to that shown in
Figure 2-2. Test Setup B
7. AC Adapter Input Fast Charge. Increase the output voltage of power supply #2 slowly to 3.5 V. Verify
the red LED (D3) and green LED (D4) are on and the green LED (D2) is off. Verify I
O
is between 450
mA and 550 mA (NOTE: If a Fluke 75 multimeter is used as the current meter, make sure the meter is
switched to A and the A socket is used instead of mA for this measurement). Verify the voltage of SYS
(J3) is below 100 mV.
switched to A and the A socket is used instead of mA for this measurement). Verify the voltage of SYS
(J3) is below 100 mV.
8. AC Adapter Input Sleep Mode. Increase the output voltage of power supply #2 slowly to 6 V. Verify
both the red LED (D3) and the green LED (D2) are off.
9. DC-DC Converter Under Full-Load Condition (bq25012 as an Example). Increase the output
8
Basic Functions Evaluation
SLUU214A – December 2004 – Revised June 2007