Texas Instruments bq24750, User Manual

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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
V
V
Iin
I
Power
supply #1
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
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
V
V
V
V
Iin
I
Power
supply #1
V
Iin
I
Power
supply #1
Test Summary
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Figure 2. Original Test Setup for HPA207-002, -003, -006, or -007
2.4 Procedure
2.4.1 AC ADAPTER DETECTION THRESHOLD
1. Make sure EQUIPMENT SETUP steps are followed.
2. (For HPA207-001, -004, or -005 only) Turn on PS2.
3. Turn on PS1.
Measure → V(J6(VSYS)) = 0 ± 500mV
Measure → V(TP(VREF)) = 0V ± 500mV
Measure → V(TP(REGN)) = 0V ± 500mV
4. Increase the output voltage of PS1 until D7 (ACGOOD) on but do not exceed 19V.
Measure
→
V(TP(ACDET)) = 2.4V ± 150mV
Measure → V(J1(POS)) = 17.8V ± 1V
Measure
→
V(J6(SYS)) = 17.8V ± 1V
Measure → V(TP(VREF)) = 3.3V ± 200mV
Measure
→
V(TP(REGN)) = 6V ± 500V (For HPA207-001, -002, or -004)
Measure → V(TP(REGN)) = 0.7V ± 700mV (For HPA207-003, -005, -006, -007 only)
Measure
→
D4 (ACDRV) on. (Note: ignore D5 if testing HPA207-002, -003, -006, or -007)
2.4.2 SELECTION OF REGULATION VOLTAGE
1. Increase the voltage of PS1 until V(J5(POS)) = 19V± 0.1V.
Measure → V(J6(BAT, GND)) = 0V ± 1V
Uninstall JP9 (enable the charging)
Observe
→ D3 (CHG EN) on
Measure → V(J6(BAT)) = 12.6V ± 200mV
2. Install JP10 (CELLS, HI)
Measure → V(J6(BAT)) = 16.8V ± 200mV
3. Install JP10 (CELLS, LO)
Measure → V(J6(BAT)) = 12.6V ± 200mV
6 bq24750/50A/51/51A/51B/52/53 EVM (HPA207) For Multi —Cell Synchronous SLUU283D – May 2007 – Revised March 2010
Notebook Charger and System Power Selector
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