Texas Instruments TPS658 EVM Series, User Manual

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Test Summary
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1.2 Performance Specification Summary
This section summarizes the performance specifications of the EVM. Table 2 gives the performance
specifications of the EVM.
Table 2. Performance Specification Summary
Specification Test Conditions Min Typ Max Units
Input DC Voltage, V
I(DC)
V
REG
+0.5 5.0 6
(1)
Volts
Battery Charge Current, I
O(CHG)
1.5
(1)
Amps
Power Dissipation Pin-Pout 5 Watts
(1)
The AC and USB FETs are rated for 18 VDC (all other pens are <6.5 V, see data sheet) but typically this high rating is for
transients protection and not for normal operation. The thermal layout on this PCB is optimal and can dissipate up to 5 W with an
ambient of 35°C, before the internal junction temperature reaches 125°C. If it is desired to apply DC voltages above 6 V, the
charging and load currents may have to be reduced to stay below the 125°C junction temperature. The IC automatically reduces
the charging current, with its thermal loop, once the temperature reaches ~12°C. Any further load reduction (on switchers or
LDOs) has to be done manually to reduce the junction temperatures. The 125°C threshold is somewhat hard to reach unless the
input voltage is high along with high load current, which is not typical.
2 Test Summary
This section shows the test setups used and the features available in evaluating the EVM.
2.1 EQUIPMENT – SM1/SM2, LDO, and Battery Load Boards not Provided
1. Computer running Windows
®
XP and the attached software.
2. EV2300 HPA002 I2C communication box, USB cable and I2C 4-lead cable (all purchased separately).
3. SM1/2 load board; 10- Ω , 1-W resistor load for each output TB1-1/2 and TB2-1/2. See Figure 2 .
4. LDO load board: 33- Ω , 1-W each for J4-LDO0 to A1 GND, J5-LDO1 to A1 GND, J7-LDO2 to A1 GND;
511- Ω , 0.5-W pullup resistors J10-LED_PWM to TP29-SYS_OUT and PWM to TP29-SYS_OUT; 51- Ω ,
1-W load resistors for J19-LDO3 to A2 GND, J18-LDO4 to A2 GND, J16-LDO5 to A2 GND. See
Figure 2 .
5. Battery-simulated load board: Two 5.6-
Ω
, 20-W and one 10-
Ω
, 5-W resistors in parallel and connected
TB7-1/2 (~2.19 Ω ). See Figure 2 .
6. Dual power supply, 0-V to 5-V adjustable range, 0-A to 3-A adjustable current limit
7. Scope
8. DMM meter(s).
4 TPS658xxEVM Integrated Single-Cell, Lithium-Ion Battery- and Power- SLVU154B – March 2006 – Revised October 2013
Management IC With I2C, LED Drives, Two Synchronous Buck, Boost, and
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Multiple LDOs