mc33351adtb ON Semiconductor, mc33351adtb Datasheet - Page 3

• Manufacturer Part Number: mc33351adtb
• Description: Lithium Battery Protection Circuit For Three Battery Packs
• Manufacturer: ON Semiconductor

Cell 3
Cell 2
Cell 1
R
Discharge Current
th(HS)
Charge Interrupt
Limit Threshold
Mode Select
Current Limit
Overvoltage
High−Side
Shutdown
High−Side
Discharge
Balance 3
Balance 2
Balance 1
Cell 1/V
Ground
Delay
Cell 3
Cell 2
V
Shutdown Delay
CC
11
16
17
18
19
12
14
15
20
13
6
3
C
Current Limit
/
Discharge
Smart Battery Pack with High−Side Discharge Current Sensing
MC33351A
10 k
10 k
10 k
4
Discharge Current
C
Limit Detector
dly
Discharge Switch Q2
Cell Voltage
Balancing
http://onsemi.com
Selector
Logic
Cell
5
Low−Side
Discharge Current
Limit Input
Figure 2.
3
RG
Ck
Ck
Microcontroller Output Ports
Discharge
Gate Drive
Output
7
Control Logic Inputs from
Control Logic
Cell Voltage
1
Charge
Inhibit Input
Over/Under
Over/Under
Data Latch
10 k
Reference
Charge/Discharge
Oscillator
Detector
Floating
4.7 M
Gate Drivers
&
&
V
C
RG
10 k
Charge Switch Q1
Charge
Gate Drive
Output
9
En
2
Discharge Inhibit Input
R1
R2
R3
Enable
Sense
V
Charge and
Discharge Gate
Drive Common
8
CC
Undervoltage
Fault Output
10
22 mfd
5.1 k
C
+
R
T
C
T
I