The MAX8845Z evaluation kit (EV kit) is a fully assembled
and tested PCB for evaluating the MAX8845Z/MAX8845Y 28V linear Li+ battery chargers.
The MAX8845Z EV kit features an overvoltage-protected
LDO output (SAFEOUT) for low-voltage-rated USB
or charger inputs in the system, and a battery pack
detection circuit (DETBAT) that disables the IC when
the battery pack is absent. The IC disables charging if
the input sources exceed 7.5V to protect against
unqualified or faulty AC adapters. The MAX8845Z EV kit
also features an adjustable fast-charge current set by
an external resistor (R1) and an adjustable top-off current
threshold set by an external resistor (R2).
Other features include an active-low control input (EN)
and an active-low input power source detection output
(POK). The IC also contains a booting assistant circuit
that distinguishes input sources and battery connection,
and provides an output signal (MAX8845Z = ABO, MAX8845Y = active-low ABO) for system booting.
To evaluate the MAX8845Y version, order the
MAX8845YETC+ along with the MAX8845ZEVKIT+ and
see the Evaluating the MAX8845Y section.
Key Features
Applications/Uses
CCCV, Thermally Regulated Linear Single-Cell Li+
Battery Charger
No External MOSFET, Reverse-Blocking Diode, or
Current-Sense Resistor
Programmable Fast-Charge Currents (1ARMS max)
Programmable Top-Off Current Threshold
Input Overvoltage-Protected 4.7V Output
(SAFEOUT) from DC
Proprietary Die Temperature Regulation Control
(+115°C)
4.25V to 28V Input-Voltage Range with Input
Overvoltage Protection Above +7.5V
Low-Dropout Voltage (300mV at 500mA)
Input Power-Source Detection Output (Active-Low POK),
Charge Status Output (Active-Low CHG), and Charge-Enable
Input (Active-Low EN)
Output for Autobooting (MAX8845Z = ABO,
MAX8845Y = Active-Low ABO)
* Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
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