Texas Instruments bq24750, Руководство пользователя

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BQ24751 EVM
ACPWR
J1
PGND
SYS
J6
GND
BAT
VREF
JP3
TS
DPMDET
ACGOOD
APPLICATION CIRCUIT
PH
BAT
SYS
VIN
IADPTF
J3
J5
J2
J4
JP9
JP1
U1
JP2
JP8
JP6 JP4
JP10 JP5 JP7
J7
V
Iin
I
Power
supply #1
Ibat
V
Isys
V
I
Load
#1
Load
#2
I
BQ24751 EVM
ACPWR
J1
PGND
SYS
J6
GND
BAT
VREF
JP3
TS
DPMDET
ACGOOD
APPLICATION CIRCUIT
PH
BAT
SYS
VIN
IADPTF
J3
J5
J2
J4
JP9
JP1
U1
JP2
JP8
JP6 JP4
JP10 JP5 JP7
J7
V
Iin
I
Power
supply #1
V
Iin
I
Power
supply #1
Ibat
V
Isys
V
I
Load
#1
Load
#2
I
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Test Summary
2.4.3 CHARGE CURRENT AND AC CURRENT REGULATION (DPM)
1. Install JP9 (Disable the charging).
2. Connect the Load 2 in series with a current meter (multimeter) to J6 (BAT, GND). Make sure a voltage
meter is connected across J6 (BAT, GND). Turn on the Load 2. Set the output voltage to 10.5V.
3. Connect the output of the Load 1 in series with a current meter (multimeter) to J6 (SYS, GND). Make
sure a voltage meter is connected across J6 (SYS, GND). Turn on the power of the Load 1. Set the
load current to 4A ± 50mA but disable the output. The setup is now like
Figure 3 for HPA207-001, -004
or -005 and like Figure 4 for HPA207-002, -003, -006, or -007. Make sure Ibat = 0A ± 10mA and Isys =
0A ± 10mA.
Figure 3. Test Setup for HPA207-001, -004, or -005
Figure 4. Test Setup for HPA207-002, -003, -006, or -007
4. Uninstall JP9 (Enable the charging).
Observe → D3 (CHG EN) on
5. Measure → Ibat = 3000mA ± 200mA
Measure
→
V(TP(IOUT)):= 300mV ± 100mV (For HPA207-001, 002, -003, -005, -006, or -007)
Measure → V(TP(IOUT)):= 600mV ± 100mV (For HPA207-004 only)
6. Enable the output of the Load 1.
Observe → D5 (DPMDET) on (For HPA207-001, -004, or -005 only)
Measure → Isys = 4000mA ± 200mA, Ibat = 1000mA ± 500mA, Iin = 4500mA ± 400mA
7. Turn off the Load 1.
Measure → Isys = 0 ± 100mA, Ibat = 3000mA ± 200mA
7 SLUU283D – May 2007 – Revised March 2010 bq24750/50A/51/51A/51B/52/53 EVM (HPA207) For Multi —Cell Synchronous
Notebook Charger and System Power Selector
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