MC33342

Manufacturer Part NumberMC33342
Description(MC33340 / MC33342) Battery Fast Charge Controllers
ManufacturerON Semiconductor
MC33342 datasheet
 


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MC33340, MC33342
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/Undertemperature Detection
Battery Over and Undervoltage Fast Charge Protection
Power Supply Input Undervoltage Lockout with Hysteresis
Operating Voltage Range of 3.25 V to 18 V
177 seconds Fast Change Holdoff Time (MC33340)
708 seconds Fast Change Holdoff Time (MC33342)
Pb−Free Packages are Available
DC
Input
Internal Bias
Voltage to
V
sen
Frequency
Converter
1
Ck
F/V
High
Over
Battery
Detect
Low
Under
−DV Detect
Counter
V
sen
Timer
Gate
V
sen
2
Gate
3
Fast/
F/T
Trickle
GND
4
This device contains 2,512 active transistors.
Figure 1. Simplified Block Diagram
© Semiconductor Components Industries, LLC, 2005
July, 2005 − Rev. 7
www.DataSheet4U.com
V
8
CC
Undervoltage
Lockout
V
CC
Over
Temp
Latch
R
R
Battery
Q
S
Pack
Temp
Detect
t1/T
High
ref
t1
7
t2/T
sen
t2
6
t3/T
Low
ref
t3
5
V
CC
t/T
Time/
Temp Select
1
http://onsemi.com
MARKING
DIAGRAMS
8
PDIP−8
MC3334xP
P SUFFIX
CASE 626
8
1
1
8
SOIC−8
3334x
NB SUFFIX
8
ALYWX
CASE 751
1
1
x
= 0 or 2
A
= Assembly Location
L
= Wafer Lot
Y
= Year
W
= Work Week
G
= Pb−Free Package
PIN CONNECTIONS
V
V
Input
1
8
CC
sen
t1/T
2
7
V
Gate Output
ref
sen
3
6
Fast/Trickle Output
t2/T
sen
4
5
t3/T
Gnd
ref
(Top View)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 13 of this data sheet.
Publication Order Number:
MC33340/D
AWL
YYWW
G
High
Low

MC33342 Summary of contents

  • Page 1

    ... MC33340, MC33342 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 ...

  • Page 2

    ... If these limits are exceeded, device functional operation is not implied, damage may occur and reliability may be affected. 1. This device series contains ESD protection and exceeds the following tests: Human Body Model 2000 V per MIL−STD−883, Method 3015 MC33340, MC33342 Symbol V CC ...

  • Page 3

    ... CC 2. Whichever voltage is lower. 3. Tested junction temperature range for the MC33340/342: MC33340, MC33342 (V = 6.0 V, for typical values T = 25°C, for min/max values T CC ...

  • Page 4

    ... Figure 4. Temperature Select Threshold Voltage versus Temperature 3.1 Startup Threshold (V Increasing) CC 3.0 2.9 2.8 Minimum Operating Threshold (V Decreasing) CC 2.7 − 50 − AMBIENT TEMPERATURE (°C) A Figure 6. Undervoltage Lockout Thresholds versus Temperature MC33340, MC33342 6 8.0 0 −8.0 −16 75 100 125 − 50 − 25° ...

  • Page 5

    ... Both outputs can be used to drive optoisolators in primary side applications that input that require galvanic isolation. Figure 9 shows the typical charge sen characteristics for NiCd and NiMh batteries. MC33340 or MC33342 Undervoltage Lockout Internal Bias Voltage to Frequency Converter ...

  • Page 6

    ... A representative block diagram of the negative slope voltage detector is shown in Figure 10. It includes a Synchronous Voltage to Frequency Converter, a Sample Timer, and a Ratchet Counter. The V sen the Voltage to Frequency Converter (VFC), and it connects to the rechargeable battery pack terminals through a MC33340, MC33342 V max T Voltage Temperature Relative Pressure ...

  • Page 7

    ... V − 0 MC33340, MC33342 in voltage during the holdoff time and the input voltage never rises above that last detected level, the Fast/Trickle ) has elapsed output will latch into a low state. The negative slope voltage hold detector has a maximum resolution of 2 ...

  • Page 8

    ... Time Time Time Time Temperature MC33340, MC33342 by removing and reconnecting the battery pack or by cycling the power supply voltage. If the charger does not require either the time or temperature backup features, they can both be easily disabled. This is accomplished by biasing the t3/T input to a voltage greater than t2 ...

  • Page 9

    ... It is possible to enter this test mode during operation if the equivalent battery pack voltage was to fall below 1.0 V. This will not present a problem since the device would normally switch from fast to trickle mode under these MC33340, MC33342 Controller Operation enters this voltage range, and a reset pulse is then applied to sen ...

  • Page 10

    ... Test Normal 5 2 ÷2 ÷2 ÷2 ÷ Switch Switch MC33340 MC33342 Holdoff Time Signal Figure 11. Timer Functional Block Diagram IC1 MC33340 or MC33342 Internal Bias R2 Voltage to V sen Frequency 1 Converter F/V R 0.01 Over High 2.0 V Battery Detect 1.0 V Low Under − ...

  • Page 11

    ... D2 R7 (Circuit of Figure 12) UC3842 Series Voltage 1.0 mA Feedback 2R Input 2 R Error Amplifier 1 Output/ Gnd Compensation Primary Circuitry Isolation Boundary Secondary Circuitry V Battery MC33340 or MC33342 V sen Gate 2 3 Fast/ Trickle Gnd http://onsemi.com 11 2.25″ MC33340 (Bottom View) 1.0 V Current Sense Comparator 5 V sen Gate F/T ...

  • Page 12

    ... R1, R2, R3 and C1 can be deleted, and Pin 1 must be grounded. The trickle current level is set by resistor R4 recommended that a redundant charge termination method be employed for end user protection. This is especially true for fast charger systems. For additional converter design information, refer to the MC34166 and MC34167 data sheets. MC33340, MC33342 V CC ...

  • Page 13

    ... MC33340PG MC33342D MC33342DG MC33342DR2 MC33342DR2G MC33342P MC33342PG †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. MC33340, MC33342 Package SO−8 SO−8 (Pb−Free) SO−8 SO−8 (Pb−Free) PDIP−8 PDIP−8 (Pb− ...

  • Page 14

    ... F −A− NOTE 2 C −T− N SEATING PLANE 0.13 (0.005) M MC33340, MC33342 PACKAGE DIMENSIONS PDIP−8 P SUFFIX CASE 626−05 ISSUE http://onsemi.com 14 NOTES: 1. DIMENSION L TO CENTER OF LEAD WHEN FORMED PARALLEL. 2. PACKAGE CONTOUR OPTIONAL (ROUND OR SQUARE CORNERS) ...

  • Page 15

    ... H D 0.25 (0.010 *For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. MC33340, MC33342 PACKAGE DIMENSIONS SOIC−8 NB CASE 751−07 ISSUE 0.10 (0.004) ...

  • Page 16

    ... P.O. Box 61312, Phoenix, Arizona 85082−1312 USA Phone: 480−829−7710 or 800−344−3860 Toll Free USA/Canada Fax: 480−829−7709 or 800−344−3867 Toll Free USA/Canada Email: orderlit@onsemi.com MC33340, MC33342 N. American Technical Support: 800−282−9855 Toll Free USA/Canada Japan: ON Semiconductor, Japan Customer Focus Center 2− ...