MC33341 Motorola, MC33341 Datasheet - Page 8

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

The above figure shows the MC33341 configured for source high–side current sensing with an externally adjustable current
threshold. Operation of this circuit is similar to that of Figure 13. The current regulation threshold can be adjusted over a range
of 0 V to 200 mV with respect to Pin 4.
8
Source
Current
Control
Source
Return
Isolator
Opto
V reg
+
+
Externally Adjustable Current and Internally Fixed Voltage Thresholds
V
1.2 R2
th(V)
R1
R2
R1
)
)
1
Figure 14. Source High–Side Current Sensing with
1.2 V
1
8
1
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
V
R S
th(Pin 2)
V sen
I sen
R
V th
I th
S
0.2 V
V CC
V
6
I
3
V CC
Transconductance
R3
V CC
Comp
0.2 V 0.4 V 1.2 V
Amp
Reference
V CC
V CC
MOTOROLA ANALOG IC DEVICE DATA
R3
+
5
4
R2
I
pk
R
0.02
S
– 0.6
R1
Load
Load
Battery or
Resistive
Load