MC33340 Datasheet, PDF (1/12 Pages) ON Semiconductor – BATTERY FAST CHARGE CONTROLLERS

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.
• Negative Slope Voltage Detection with 4.0 mV Sensitivity
• 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
Simplified Block Diagram
MC33340
BATTERY FAST CHARGE
CONTROLLER
SEMICONDUCTOR
TECHNICAL DATA
8
1
P SUFFIX
PLASTIC PACKAGE
CASE 626
8
1
D SUFFIX
PLASTIC PACKAGE
CASE 751
(SO–8)
DC
Input
VCC 8
Vsen
1
Vsen
Gate
2
3
Fast/
Trickle
Internal Bias
Undervoltage
Lockout
Voltage to
Frequency
Converter
Ck
High
Battery
Detect
Low
F/V R
Over
Under
Over
Temp
R ^Latch
Q
S
Temp
Detect
t1
–∆V Detect
Counter
Timer _t2
Vsen
Gate
t3
F/T
Gnd
t/T
Time/
Temp
Select
4
VCC
Battery
Pack
t1/Tref High
7
t2/Tsen
6
t3/Tref Low
5
VCC
This device contains 2,512 active transistors.
This document contains information on a new product. Specifications and information herein
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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)
ORDERING INFORMATION
Device
Operating
Temperature Range Package
MC33340D
MC33340P
SO–8
TA = –25° to +85°C
Plastic DIP
© Motorola, Inc. 1996
Rev 0
1