MC33341 Motorola, MC33341 Datasheet - Page 3

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

ELECTRICAL CHARACTERISTICS
temperature range that applies (Note 1), unless otherwise noted.)
DIFFERENTIAL AMPLIFIER DISABLE LOGIC (Pins 1, 6)
VOLTAGE SENSING (Pins 5, 6)
DRIVE OUTPUT (Pin 8)
TOTAL DEVICE (Pin 7)
NOTE: 1. Tested ambient temperature range for the MC33341: T low = –25 C, T high = +85 C.
MOTOROLA ANALOG IC DEVICE DATA
Pin
Logic Threshold Voltage Pin 1 (Pin 6 = 0 V)
Positive Sensing Pin 5 to Pin 4
Voltage Sense, Input Bias Current (Pin 5)
Transconductance, Voltage Sensing Inputs to Drive Output
High State Source Voltage (I Source = 10 mA)
High State Source Current (Pin 8 = 0 V)
Operating Voltage Range
Power Supply Current (V CC = 6.0 V)
1
2
3
4
5
6
7
8
Enabled, High–Side Source and Load Current Sensing
Disabled, Low–Side Load and Source Return Current Sensing
Internally Fixed Threshold Voltage
Externally Adjusted Threshold Voltage (Pin 6 = 0 V)
Externally Adjusted Threshold Voltage (Pin 6 = 1.2 V)
T A = 25 C
T A = T low to T high
Current Sense Input A
Current Threshold Adjust
Compensation
Ground
Voltage Sense Input
Current Sense Input B/
Voltage Threshold Adjust
V CC
Drive Output
Name
Characteristic
This is the positive supply voltage for the regulation control IC. The typical operating voltage range is
This multi–mode current sensing input can be used for either source high–side, load high–side,
source–return low–side, or load low–side sensing. It is common to a Differential Amplifier, Inverting
Amplifier, and a Noninverting input path. Each of these sensing paths indirectly connect to the current
sense input of the Transconductance Amplifier. This input is connected to the high potential side of a
current sense resistor when used in source high–side, load high–side, or load low–side current
sensing modes. In source return low–side current sensing mode, this pin connects to the low potential
side of a current sense resistor.
The current sense threshold can be externally adjusted over a range of 0 V to 200 mV with respect to
Pin 4, or internally fixed at 200 mV by connecting Pin 2 to V CC .
This pin is connected to a high impedance node within the transconductance amplifier and is made
available for loop compensation. It can also be used as an input to directly control the Drive Output.
An active low at this pin will force the Drive Output into a high state.
This pin is the regulation control IC ground. The control threshold voltages are with respect to this pin.
This is the voltage sensing input of the Transconductance Amplifier. It is normally connected to the
power supply/battery charger output through a resistor divider. The input threshold is controlled by
Pin 6.
This is a dual function input that is used for either high–side current sensing, or as a voltage threshold
adjustment for Pin 5. This input is connected to the low potential side of a current sense resistor when
used in source high–side or load high–side current sensing modes. In all low–side current sensing
modes, Pin 6 is available as a voltage threshold adjustment for Pin 5. The threshold can be externally
adjusted over a range of 0 V to 1.2 V with respect to Pin 4, or internally fixed at 1.2 V by connecting
Pin 6 to V CC .
2.3 V to 15 V with respect to Pin 4.
This is a source–only output that normally connects to a linear or switching regulator control circuit.
This output is capable of 15 mA, allowing it to directly drive an optoisolator in primary side control
applications where galvanic isolation is required.
(continued) (V CC = 6.0 V, T A = 25 C, for min/max values T A is the operating junction
PIN FUNCTION DESCRIPTION
MC33341
V th(I HS)
V th(I LS)
Symbol
I Source
V th(V)
g m(V)
I IB(V)
V OH
V CC
I CC
Description
2.5 to 15
1.186
1.174
Min
15
–
–
–
–
–
–
–
–
V CC – 0.8
2.3 to 15
1.210
1.175
Typ
300
7.0
40
10
20
1.7
1.3
–
1.234
1.246
Max
600
–
–
–
–
–
–
–
–
–
mhos
Unit
mV
mA
nA
V
V
V
V
V
V
A
3