LinearVoltageRegulators Motorola Semiconductor Products, LinearVoltageRegulators Datasheet - Page 36

• Manufacturer Part Number: LinearVoltageRegulators
• Description: Analog And Interface Integratedcircuits Selector Guide & Cross Reference
• Manufacturer: Motorola Semiconductor Products

Battery Management Circuits
Battery Charger ICs
Battery Fast Charge Controller
MC33340P, D
T A = –25 to +85 C, Case 626, 751
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 pri-
mary 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
ANALOG AND INTERFACE INTEGRATED CIRCUITS
SELECTOR GUIDE & CROSS REFERENCE
The MC33340 is a monolithic control IC that is specifically
Input
DC
Trickle
V sen
V sen
Gate
Fast/
1
2
3
Internal Bias
Battery
Detect
Frequency
Voltage to
Converter
High
Low
V sen
Gate
F/T
Ck
Gnd
– V Detect
Counter
Timer
F/V
4
Under
product testing. This device is available in an economical
8–lead surface mount package.
Over
R
Undervoltage
Lockout
t/T
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
Operating Voltage Range of 3.0 V to 18 V
Hysteresis
t1
t2
t3
Time/
Temp
Select
Q
R
S
Temp
Detect
Over
Temp
Latch
V CC
8
V CC
V CC
t1/T ref High
7
t2/T sen
6
t3/T ref Low
5
Battery
Pack
MOTOROLA
65