Texas Instruments bq25570, Руководство пользователя

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Introduction
1.5 EVM I/O Connections
Table 1. I/O Connections and Configuration for Evaluation of bq25570 EVM
Headers and Description Comments/Recommended Setting
Terminals
J1–VIN Input source (+) If VIN_DC is higher than VSTOR and VSTOR is equal to VBAT_OV, the input VIN_DC is pulled to ground
through a small resistance to stop further charging of the attached battery or capacitor. It is critical that if
J2 - VIN/GND Input source terminal block
this case is expected, the impedance of the source attached to VIN_DC be higher than 20
Ω
and not a
J3–GND Input source return (–)
low impedance source.
J4 - VSTOR Boost charger output (+) Buck converter input
J5 - VSTOR/GND Boost charger output terminal block
J6 - GND Boost charger return (-)
J7– VBAT Rechargeable storage element connection (+)
J8 - VBAT/GND Rechargeable storage element terminal block
J9–GND Rechargeable storage element connection return (–)
J10 – VOUT Buck converter output (+)
J11 - VOUT/GND Buck converter output terminal block
J12 -GND Buck converter output (-)
J13 – BAT_OK Battery Status Indicator (+/-)
Test Points
TP1 Input source (+)
TP2 Boost charger switching node
TP3 Buck converter switching node
TP4 Boost charger output, VSTOR (+)
TP5 Rechargeable storage element connection, BAT_SEC (+)
TP6 Buck converter output, VOUT (+)
TP7 VRDIV node CAUTION Providing an additional low impedance current path in parallel with the feedback resistors , for
example, with a 10 M
Ω scope probe attached, will degrade regulation accuracy.
TP8 Output return (-)
TP9 Input return (-)
Jumpers
JP1 – VOC_SAMP VOC_SAMP = external resistors sized to configure the IC Uninstalled (NOTE: Do not install if JP4 shunt is installed)
to regulate VIN to 75% of VOC_SAMP.
JP2 - /EN /EN = GND enables the IC. /EN=VSTOR disables the IC. /EN=GND
JP3 - VOUT_EN VOUT_EN = VSTOR enables the buck converter when VOUT_EN=VSTOR (NOTE: Do not install if JP6 shunt is installed)
VSTOR is up VOUT_EN = GND disables the buck
converter
5 SLUUAA7A – July 2013 – Revised August 2014 User's Guide for bq25570 Battery Charger Evaluation Module for Energy
Harvesting
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