Order this document by MC33340/D
Advance Information
Battery Fast Charge
Controller
The MC33340 is a monolithic control IC that is specifically designed as a
fast charge controller for Nickel Cadmium (NiCd) and Nickel Metal Hydride
(NiMH) batteries. This device features negative slope voltage detection as
the primary means for fast charge termination. Accurate detection is ensured
by an output that momentarily interrupts the charge current for precise
voltage sampling. An additional secondary backup termination method can
be selected that consists of either a programmable time or temperature limit.
Protective features include battery over and undervoltage detection, latched
over temperature detection, and power supply input undervoltage lockout
with hysteresis. Provisions for entering a rapid test mode are available to
enhance end product testing. This device is available in an economical
8–lead surface mount package.
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Negative Slope Voltage Detection with 4.0 mV Sensitivity
MC33340
BATTERY FAST CHARGE
CONTROLLER
SEMICONDUCTOR
TECHNICAL DATA
•
•
•
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•
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Accurate Zero Current Battery Voltage Sensing
High Noise Immunity with Synchronous VFC/Logic
Programmable 1 to 4 Hour Fast Charge Time Limit
Programmable Over/Under Temperature Detection
Battery Over and Undervoltage Fast Charge Protection
Rapid System Test Mode
Power Supply Input Undervoltage Lockout with Hysteresis
Operating Voltage Range of 3.0 V to 18 V
8
1
8
1
P SUFFIX
PLASTIC PACKAGE
CASE 626
Simplified Block Diagram
D SUFFIX
PLASTIC PACKAGE
CASE 751
(SO–8)
Regulator
DC
Input
VCC
Undervoltage
Lockout
8
Internal Bias
Vsen
1
Voltage to
Frequency
Converter
Ck
High
Battery
Detect
Low
F/V
VCC
Over
Temp
Latch
Battery
Pack
Temp
Detect
Under
t1
t1/Tref High
7
t2/Tsen
6
t3
t3/Tref Low
5
VCC
PIN CONNECTIONS
Vsen Input 1
Vsen Gate Output 2
Fast/Trickle Output 3
Gnd 4
8 VCC
7 t1/Tref High
6 t2/Tsen
5 t3/Tref Low
(Top View)
R
Over
Q
R
S
Vsen
Gate
2
3
Fast/
Trickle
–∆V Detect
Counter
Timer t2
Vsen
Gate
F/T
t/T
Time/
Temp
Select
ORDERING INFORMATION
Device
MC33340D
Operating
Temperature Range
TA = –25° to +85°C
Package
SO–8
Plastic DIP
Rev 0
Gnd
4
This device contains 2,512 active transistors.
This document contains information on a new product. Specifications and information herein
are subject to change without notice.
MC33340P
©
Motorola, Inc. 1996
MOTOROLA ANALOG IC DEVICE DATA
1
MOTOROLA [ MOTOROLA, INC ]
