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MC33163 Schematic ( PDF Datasheet ) - Motorola Semiconductors

Teilenummer MC33163
Beschreibung POWER SWITCHING REGULATORS
Hersteller Motorola Semiconductors
Logo Motorola Semiconductors Logo 




Gesamt 16 Seiten
MC33163 Datasheet, Funktion
Order this document by MC34163/D
Power Switching Regulators
The MC34163 series are monolithic power switching regulators that
contain the primary functions required for dc–to–dc converters. This series is
specifically designed to be incorporated in step–up, step–down, and
voltage–inverting applications with a minimum number of external
components.
These devices consist of two high gain voltage feedback comparators,
temperature compensated reference, controlled duty cycle oscillator, driver
with bootstrap capability for increased efficiency, and a high current output
switch. Protective features consist of cycle–by–cycle current limiting, and
internal thermal shutdown. Also included is a low voltage indicator output
designed to interface with microprocessor based systems.
These devices are contained in a 16 pin dual–in–line heat tab plastic
package for improved thermal conduction.
Output Switch Current in Excess of 3.0 A
Operation from 2.5 V to 40 V Input
Low Standby Current
Precision 2% Reference
Controlled Duty Cycle Oscillator
Driver with Bootstrap Capability for Increased Efficiency
Cycle–by–Cycle Current Limiting
Internal Thermal Shutdown Protection
Low Voltage Indicator Output for Direct Microprocessor Interface
Heat Tab Power Package
MC34163
MC33163
POWER SWITCHING
REGULATORS
SEMICONDUCTOR
TECHNICAL DATA
16
1
P SUFFIX
PLASTIC PACKAGE
CASE 648C
(DIP–16)
16
1
DW SUFFIX
PLASTIC PACKAGE
CASE 751G
(SOP–16L)
Representative Block Diagram
Ipk Sense 8
VCC 7
Timing
Capacitor
6
ILimit
+
+
OSC
9
Driver
Collector
10
Switch
Collector
11
5
Gnd
4
Control Logic
and Thermal
Shutdown
+
12
Gnd
13
Voltage
Feedback 1
3
Voltage
Feedback 2
2
LVI Output 1
LVI
+
+
VFB
+
+
+
14
Switch
Emitter
15
16
Bootstrap
Input
(Bottom View)
This device contains 114 active transistors.
MOTOROLA ANALOG IC DEVICE DATA
PIN CONNECTIONS
LVI Output 1
Voltage Feedback 2 2
Voltage Feedback 1 3
4
Gnd
5
Timing Capacitor 6
VCC 7
Ipk Sense 8
16 Bootstrap Input
15 Switch
14 Emitter
13
Gnd
12
11
Switch Collector
10
9 Driver Collector
(Top View)
ORDERING INFORMATION
Device
Operating
Temperature Range Package
MC34163DW
MC34163P
TA = 0° to +70°C
SOP–16L
DIP–16
MC33163DW
MC33163P TA = – 40° to +85°C
SOP–16L
DIP–16
© Motorola, Inc. 1996
Rev 2
1






MC33163 Datasheet, Funktion
MC34163 MC33163
Figure 15. Minimum Operating Supply
Voltage versus Temperature
3.0
2.6
Pin 16 Open
2.2
CT = 620 pF
Pins 7,8 = VCC
Pins 4, 14 = Gnd
Pin 9 = 1.0 kto 15 V
Pin 10 = 100 to 15 V
1.8
Pin 16 = VCC
1.4
Figure 16. P Suffix (DIP–16) Thermal Resistance
and Maximum Power Dissipation
versus P.C.B. Copper Length
100 5.0
ÎÎÎÎÎÎÎÎÎÎÎÎPrinted circuit board heatsink example
80
L
2.0 oz
Copper
4.0
60
RθJA
L 3.0 mm
Graphs represent symmetrical layout
3.0
40 2.0
20 PD(max) for TA = 70°C
1.0
1.0
– 55
– 25 0 25 50 75 100
TA, AMBIENT TEMPERATURE (°C)
125
00
0 10 20 30 40 50
L, LENGTH OF COPPER (mm)
Figure 17. DW Suffix (SOP–16L) Thermal Resistance and
Maximum Power Dissipation versus P.C.B. Copper Length
100 2.8
PD(max) for TA = 50°C
90 2.4
80 2.0
Graph represents symmetrical layout
ÎÎÎ ÎÎÎ70 1.6
ÎÎÎÎÎÎÎ60
L
2.0 oz.
Copper
1.2
ÎÎÎÎÎÎÎÎÎÎÎÎÎ50
L 3.0 mm
0.8
40 RθJA
0.4
30 0
0 10 20 30 40 50
L, LENGTH OF COPPER (mm)
6 MOTOROLA ANALOG IC DEVICE DATA

6 Page









MC33163 pdf, datenblatt
MC34163 MC33163
Figure 24. Voltage–Inverting Converter
RSC
8
0.25 V
+
Current
Limit
+
Vin
12 V
0.075
Cin
+7
+
330
CT
470 pF
6 Oscillator
5
Thermal
R
Q
S
Latch
4
+
9
10
Q1 11
Q2
12
60
13
Coilcraft LO451–A
3
2
+
1+
LVI
45 k
+
+
+
Feedback
Comparator
1.25 V 15 k
2.0 mA
+
1.125 V
7.0 V
+
14
15
0.02
16
L
180 µH
RB
CB
1N5822
R2
8.2 k
R1
953
(Bottom View)
2200 + CO
Vout
– 12 V/1.0 A
Test
Line Regulation
Load Regulation
Output Ripple
Short Circuit Current
Efficiency, Without Bootstrap
Efficiency, With Bootstrap
Condition
Vin = 9.0 V to 16 V, IO = 1.0 A
Vin = 12 V, IO = 0.6 A to 1.0 A
Vin = 12 V, IO = 1.0 A
Vin = 12 V, RL = 0.1
Vin = 12 V, IO = 1.0 A
Vin = 12 V, IO = 1.0 A
Results
5.0 mV = ± 0.02%
2.0 mV = ± 0.01%
130 mVpp
3.2 A
73.1%
77.5%
Figure 25. External Current Boost Connections for Ipk (Switch) Greater Than 3.4 A
Figure 25A. External NPN Switch
Figure 25B. External PNP Saturated Switch
8
7
+
6
5
4
3
2
1
9
10
Q1 11
Q2
12
+ 13
14
15
16
+
(Bottom View)
Q3
8
7
+
6
5
4
3
2
1
9
10
Q1 11
Q2
12
+ 13
14
15
16
+
(Bottom View)
Q3
12 MOTOROLA ANALOG IC DEVICE DATA

12 Page





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