MC33341 Motorola, MC33341 Datasheet - Page 14

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

The above figure shows the MC33341 configured for load low–side current sensing with an externally adjustable voltage and
current threshold. Operation of this circuit is similar to that of Figure 19. The respective voltage and current regulation threshold
can be adjusted over a range of 0 to 1.2 V and 0 V to 200 mV, with respect to Pin 4.
14
Voltage
Current
Source
Current
Control
Source
Return
Isolator
Opto
V reg
+
V
th(Pin 6)
R2
R1
)
Externally Adjustable Current and Voltage Thresholds
1
1.2 V
Figure 20. Load Low–Side Current Sensing with
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
MC33341
V CC
V CC
I reg
1.2 V
+
R3
V sen
I sen
V th
V
I th
0.2 V
th(Pin 2)
V CC
R
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
R
R1
0.02
S
– 0.6
Load
Load
R S
Battery or
Resistive
Load