Motorola MC33348D-6, MC33348D-4, MC33348D-5, MC33348D-3, MC33348D-1 Datasheet
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Order this document by MC33348/D
Advance Information
Lithium Battery Protection Circuit for One Cell Battery Packs
The MC33348 is a monolithic lithium battery protection circuit that is designed to enhance the useful operating life of a one cell rechargeable battery pack. Cell protection features consist of internally trimmed charge and discharge voltage limits, discharge current limit detection with a delayed shutdown, and a virtually zero current sleepmode state when the cell is discharged. An additional feature includes an on±chip charge pump for reduced MOSFET losses while charging or discharging a low cell voltage battery pack. This protection circuit requires a minimum number of external components and is targeted for inclusion within the battery pack. This MC33348 is available in standard SOIC 8 lead surface mount package.
•Internally Trimmed Charge and Discharge Voltage Limits
•Discharge Current Limit Detection with Delayed Shutdown
•Virtually Zero Current Sleepmode State when Cells are Discharged
•Charge Pump for Reduced Losses with a Low Cell Voltage Battery Pack
•Dedicated for One Cell Applications
•Minimum Components for Inclusion within the Battery Pack
•Available in a Low Profile Surface Mount Package
Ordering Information shown on following page.
Typical One Cell Smart Battery Pack
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7 |
VCC |
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Cell |
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Voltage |
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1 |
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MC33348 |
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Ground |
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3 |
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Test |
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2 |
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Charge Pump |
8 |
Discharge |
4 |
Charge |
6 |
5 |
Charge |
Output |
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Gate Drive |
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Gate Drive |
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Gate Drive |
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Output |
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Output |
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Common/ |
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Discharge |
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Current Limit |
This device contains 1170 active transistors.
MC33348
LITHIUM BATTERY
PROTECTION CIRCUIT
FOR
ONE CELL
SMART BATTERY PACKS
SEMICONDUCTOR
TECHNICAL DATA
8
1
D SUFFIX
PLASTIC PACKAGE
CASE 751
(SO±8)
PIN CONNECTIONS
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Charge Pump |
Cell Voltage |
1 |
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8 |
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Output |
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VCC |
Test |
2 |
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7 |
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Charge Gate |
Ground |
3 |
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6 |
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Drive Output |
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Discharge Gate |
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Charge Gate Drive |
4 |
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5 |
Common/Discharge |
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Drive Output |
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Current Limit |
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(Top View) |
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This document contains information on a new product. Specifications and information herein |
Motorola, Inc. 1997 |
Rev 1 |
are subject to change without notice. |
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MC33348
ORDERING INFORMATION
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Charge |
Charge |
Discharge |
Discharge |
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Overvoltage |
Overvoltage |
Undervoltage |
Current Limit |
Operating |
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Device |
Threshold (V) |
Hysteresis (mV) |
Threshold (V) |
Threshold (mV) |
Temperature Range |
Package |
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MC33348D±1 |
4.20 |
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2.25 |
400 |
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MC33348D±2 |
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200 |
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MC33348D±3 |
4.25 |
300 |
2.28 |
400 |
TA = ±25° to +85°C |
SO±8 |
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MC33348D±4 |
200 |
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MC33348D±5 |
4.35 |
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2.30 |
400 |
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MC33348D±6 |
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200 |
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NOTE: Additional threshold limit options can be made available. Consult factory for information.
MAXIMUM RATINGS
Ratings |
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Value |
Unit |
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Input Voltage (Measured with Respect to Ground, Pin 3) |
VIR |
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V |
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Cell Voltage (Pin 1) |
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7.5 |
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Test (Pin 2) |
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7.5 |
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Discharge Gate Drive Output (Pin 4) |
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18 |
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Charge Gate Drive Common/Discharge Current Limit (Pin 5) |
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±11 |
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Charge Gate Drive Output (Pin 6) |
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±11 |
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VCC (Pin 7) |
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7.5 |
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Charge Pump Output (Pin 8) |
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10 |
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Thermal Resistance, Junction±to±Air |
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RθJA |
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°C/W |
D Suffix, SO±8 Plastic Package, Case 751 |
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178 |
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Operating Junction Temperature (Note 1) |
TJ |
±40 to +150 |
°C |
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Storage Temperature |
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Tstg |
±55 to +150 |
°C |
NOTES: 1. Tested ambient temperature range for the MC33348: |
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Tlow = ±25°C |
Thigh = +85°C |
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2. ESD data available upon request. |
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2 |
MOTOROLA ANALOG IC DEVICE DATA |
MC33348
ELECTRICAL CHARACTERISTICS (VCC = 4.0 V, TA = 25°C, for min/max values TA is the operating junction temperature range that applies (Note 1), unless otherwise noted.)
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Characteristic |
Symbol |
Min |
Typ |
Max |
Unit |
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VOLTAGE SENSING |
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Cell Charging Cutoff (Pin 1 to Pin 3) |
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Overvoltage Threshold, VCell Increasing, TA = 25°C |
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Vth(OV) |
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V |
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±1 Suffix |
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4.158 |
4.20 |
4.242 |
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±2 Suffix |
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4.158 |
4.20 |
4.242 |
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±3 Suffix |
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4.208 |
4.25 |
4.293 |
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±4 Suffix |
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4.208 |
4.25 |
4.293 |
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±5 Suffix |
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4.306 |
4.35 |
4.394 |
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±6 Suffix |
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4.306 |
4.35 |
4.394 |
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Overvoltage Hysteresis VCell Decreasing |
VH |
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mV |
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±1 Suffix |
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± |
300 |
± |
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±2 Suffix |
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± |
300 |
± |
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±3 Suffix |
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± |
300 |
± |
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±4 Suffix |
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± |
300 |
± |
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±5 Suffix |
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± |
300 |
± |
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±6 Suffix |
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± |
300 |
± |
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Cell Discharging Cutoff (Pin 1 to Pin 3, TA = 25°C) |
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Undervoltage Threshold, VCell Decreasing |
Vth(UV) |
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V |
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±1 Suffix |
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2.205 |
2.25 |
2.295 |
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±2 Suffix |
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2.205 |
2.25 |
2.295 |
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±3 Suffix |
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2.234 |
2.28 |
2.326 |
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±4 Suffix |
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2.234 |
2.28 |
2.326 |
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±5 Suffix |
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2.254 |
2.30 |
2.346 |
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±6 Suffix |
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2.254 |
2.30 |
2.346 |
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Input Bias Current During Cell Voltage Sample (Pin 1) |
IIB |
± |
28 |
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μA |
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Cell Voltage Sampling Rate |
t(smpl) |
± |
1.0 |
± |
s |
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CURRENT SENSING |
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Discharge Current Limit (Pin 3 to Pin 5, TA = 25°C) |
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Threshold Voltage |
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Vth(dschg) |
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mV |
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±1 Suffix |
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360 |
400 |
440 |
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±2 Suffix |
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180 |
200 |
220 |
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±3 Suffix |
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360 |
400 |
440 |
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±4 Suffix |
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180 |
200 |
220 |
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±5 Suffix |
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360 |
400 |
440 |
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±6 Suffix |
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180 |
200 |
220 |
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Delay |
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Idly(dschg) |
1.0 |
2.3 |
4.0 |
ms |
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CHARGE PUMP |
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Output Voltage (Pin 8, R |
L |
≥ |
1010, T = 25°C) |
V |
O |
8.0 |
10.2 |
12 |
V |
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A |
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TOTAL DEVICE |
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Average Cell Current (TA = 25°C, Battery Pack Unloaded and without |
ICC |
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Current Limit Fault) |
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Operating (VCC = 4.0 V) |
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± |
17 |
20 |
μA |
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Sleepmode (VCC = 2.0 V) |
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± |
2.0 |
± |
nA |
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Minimum Operating Cell Voltage for Logic and Gate Drivers |
VCC |
± |
1.5 |
± |
V |
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NOTE: 1. Tested ambient temperature range for the MC33348: |
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Tlow = ±25°C |
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Thigh = +85°C |
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MOTOROLA ANALOG IC DEVICE DATA |
3 |
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MC33348
Figure 1. Charge and Discharge |
Figure 2. Discharge Current Limit |
(%) |
1.2 |
Threshold Voltage Change versus Temperature |
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Threshold Voltage Change versus Temperature |
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THRESHOLD VOLTAGE CHANGE |
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, CURRENT LIMIT THRESHOLD |
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0.8 |
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16 |
VCC = 4.0 V |
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CHANGE (%) |
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Maximum Threshold |
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0.4 |
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Charge Limits |
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8.0 |
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0 |
Typical Threshold Change |
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Typical Threshold Change |
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0 |
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±0.4 |
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±8.0 |
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, |
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th(dschg) |
VOLTAGE |
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& UV) |
±0.8 |
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±16 |
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th(OV |
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V |
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±1.2 |
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±40 |
±20 |
0 |
20 |
40 |
60 |
80 |
100 |
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±40 |
±20 |
0 |
20 |
40 |
60 |
80 |
100 |
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V |
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TA, AMBIENT TEMPERATURE (°C) |
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TA, AMBIENT TEMPERATURE (°C) |
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Figure 3. Gate Drive Output Voltage |
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12 |
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versus Load Current |
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(V) |
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(V) |
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8.0 |
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VOLTAGEOUTPUT |
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CO = 10 nF |
VOLTAGEOUTPUT |
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10 |
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TA = 25°C |
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DRIVE |
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VCC = 4.15 V |
DRIVE |
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GATE, |
6.0 |
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VCC = 3.25 V |
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GATE, |
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O |
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VCC = 2.35 V |
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O |
V |
4.0 |
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V |
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0.2 |
0.4 |
0.6 |
0.8 |
1.0 |
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0 |
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IL, OUTPUT LOAD CURRENT (μA) |
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12
10
8.0
6.0
4.0
0
Figure 4. Gate Drive Output Voltage
versus Supply Voltage
CO = 10 nF
Pin 2 = Gnd
RL ≥ 1010 Ω
TA = 25°C
1.0 |
2.0 |
3.0 |
4.0 |
5.0 |
VCC, SUPPLY VOLTAGE (V)
Figure 5. Charge Pump Output Voltage
versus Temperature
(V) |
12 |
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VOLTAGE |
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CO = 10 nF |
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R |
L |
≥ 1010 |
Ω |
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11 |
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OUTPUT |
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VCC = 4.15 V |
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In Regulation |
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10 |
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PUMP |
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, CHARGE |
9.0 |
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VCC = 2.35 V |
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Out of Regulation |
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O |
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V |
8.0 |
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±40 |
±20 |
0 |
20 |
40 |
60 |
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80 |
100 |
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TA, AMBIENT TEMPERATURE (°C) |
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Figure 6. Supply Current |
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102 |
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versus Supply Voltage |
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Battery Pack Sleepmode Range |
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A) |
101 |
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(μ |
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Battery Pack Operating Range |
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CURRENT |
10±1 |
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100 |
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SUPPLY, |
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3 |
2 |
1 |
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TA = 25°C |
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10±2 |
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1 ± Battery pack unloaded without |
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discharge current limit fault. |
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CC |
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2 ± Battery pack loaded without |
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10±3 |
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discharge current limit fault. |
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I |
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3 ± Battery pack loaded or unloaded |
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10±4 |
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with discharge current limit fault. |
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4.0 |
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0 |
1.0 |
2.0 |
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3.0 |
5.0 |
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VCC, SUPPLY VOLTAGE (V)
4 |
MOTOROLA ANALOG IC DEVICE DATA |
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