MC33341 Motorola, MC33341 Datasheet - Page 10

• Manufacturer Part Number: MC33341
• Description: POWER SUPPLY BATTERY CHARGER REGULATION CONTROL CIRCUIT
• Manufacturer: Motorola

The above figure shows the MC33341 configured for source return low–side current sensing with externally adjustable voltage
and current thresholds. Operation of this circuit is similar to that of Figure 15. The respective voltage and current regulation
threshold can be adjusted over a range of 0 to 1.6 V and 0 V to 200 mV with respect to Pin 4.
10
Voltage
Current
Source
Control
Control
Source
Return
Isolator
V reg
Opto
+
V
th(Pin 6)
R2
R1
Figure 16. Source Return Low–Side Current Sensing with
)
Externally Adjustable Current and Voltage Thresholds
1
1.2 V
8
1
R3
R
R
R
Differential Amp
Disable Logic
Differential Amp
Inverting Amp
R
R
R
V CC
V CC
0.4 V
7
2
I reg
MC33341
V CC
V CC
+
–
1.2 V
R S
V
V sen
I sen
th(Pin 2)
V th
I th
0.2 V
R
V CC
S
V
6
I
3
V CC
Transconductance
V CC
Comp
0.2 V 0.4 V 1.2 V
Amp
Reference
V CC
V CC
MOTOROLA ANALOG IC DEVICE DATA
5
4
R2
R3
+
I
pk
R1
R
0.02
S
– 0.6
Load
Load
Battery or
Resistive
Load