ATAVRSB202 Atmel, ATAVRSB202 Datasheet - Page 148

• Manufacturer Part Number: ATAVRSB202
• Description: KIT BATT MGMT FOR ATMEGA32HVB
• Manufacturer: Atmel

Specifications of ATAVRSB202

• Main Purpose: *
• Embedded: *
• Utilized Ic / Part: *
• Primary Attributes: *
• Secondary Attributes: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

25. FET Driver
25.1
25.2
8042B–AVR–06/10
Features
Overview
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•
•
The ATmega16HVB/32HVB integrates an N-channel FET driver for turning on and off external
high-side Charge and Discharge FETs in Li-ion battery packs. The FET driver is designed for
outputting a high voltage gate overdrive of typically 13V during normal operation.
Figure 25-1. Simplified Block diagram.
In normal operation FET is controlled by software. SW can enable and disable the Charge FET
and the Discharge FET by writing to the FET Control and Status Register (FCSR).
High side N-channel FET driver for controlling Charge and Discharge FETs in Li-ion battery
application
Optional Deep Under-voltage Recovery mode allowing normal operation while charging Deeply
discharged battery cells from 0-volt without an external Pre-charge FET
Optional Pre-charge FET mode that allows chargers without pre-charge functionality to charge a
Deeply discharged battery from 0-volt
Battery
Li-Ion
Cells
Pack
2-4
RPVT
PVT
CHARGER
PC5
DETECT
QPF
ATmega16HVB/32HVB
RPF
RPC
RCF
OC
OPTIONAL
FET DRIVER
QCF
FET CONTROL
VFET
ATmega16HVB/32HVB
RDF
OD
QDF
BATT
RBATT
+
-
Charger
Device
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