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

Battery Fast Charge
Controllers
The MC33340 and MC33342 are monolithic control IC’s that are
specifically designed as fast charge controllers for Nickel Cadmium (NiCd)
and Nickel Metal Hydride (NiMH) batteries. These devices feature 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. Fast charge holdoff
time is the only difference between the MC33340 and the MC33342. The
MC33340 has a typical holdoff time of 177 seconds and the MC33342 has a
typical holdoff time of 708 seconds.
• 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
• Power Supply Input Undervoltage Lockout with Hysteresis
• Operating Voltage Range of 3.0 V to 18 V
• 177 seconds Fast Change Hold–off Time (MC33340)
• 708 seconds Fast Change Hold–off Time (MC33342)
Simplified Block Diagram
Order this document by MC33340/D
MC33340
MC33342
BATTERY FAST CHARGE
CONTROLLERS
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.
MOTOROLA ANALOG IC DEVICE DATA
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
MC33340P
Plastic DIP
MC33342P
MC33340D
Plastic DIP
TA = –25° to +85°C
SO–8
MC33342D
SO–8
© Motorola, Inc. 1999
Rev 3
1