|
|
PDF MC33166 Data sheet ( Hoja de datos )
| Número de pieza | MC33166 | |
| Descripción | (MC33166 / MC34166) Step-Up/Down/Inverting Switching Regulators | |
| Fabricantes | ON Semiconductor | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de MC33166 (archivo pdf) en la parte inferior de esta página. Total 18 Páginas | ||
|
No Preview Available !
www.DataSheet4U.com
MC34166, MC33166
3.0 A, Step−Up/Down/
Inverting Switching
Regulators
The MC34166, MC33166 series are high performance fixed
frequency power switching regulators that contain the primary
functions required for dc−to−dc converters. This series was specifically
designed to be incorporated in step−down and voltage−inverting
configurations with a minimum number of external components and
can also be used cost effectively in step−up applications.
These devices consist of an internal temperature compensated
reference, fixed frequency oscillator with on−chip timing components,
latching pulse width modulator for single pulse metering, high gain
error amplifier, and a high current output switch.
Protective features consist of cycle−by−cycle current limiting,
undervoltage lockout, and thermal shutdown. Also included is a low
power standby mode that reduces power supply current to 36 mA.
Features
• Output Switch Current in Excess of 3.0 A
• Fixed Frequency Oscillator (72 kHz) with On−Chip Timing
• Provides 5.05 V Output without External Resistor Divider
• Precision 2% Reference
• 0% to 95% Output Duty Cycle
• Cycle−by−Cycle Current Limiting
• Undervoltage Lockout with Hysteresis
• Internal Thermal Shutdown
• Operation from 7.5 V to 40 V
• Standby Mode Reduces Power Supply Current to 36 mA
• Economical 5−Lead TO−220 Package with Two Optional Leadforms
• Also Available in Surface Mount D2PAK Package
• Moisture Sensitivity Level (MSL) Equals 1
• Pb−Free Packages are Available
Vin
ILIMIT
4
Oscillator
PWM
S
Q
R
2
Thermal
UVLO
Reference
L
EA
1
VO
5.05 V/
3.0 A
35
This device contains 143 active transistors.
Figure 1. Simplified Block Diagram
(Step Down Application)
http://onsemi.com
x = 3 or 4
A = Assembly Location
WL = Wafer Lot
Y = Year
WW = Work Week
G = Pb−Free Package
MARKING
DIAGRAMS
1
5
TO−220
TH SUFFIX
CASE 314A
MC
3x166T
AWLYWWG
1
5
TO−220
TV SUFFIX
CASE 314B
MC
3x166T
AWLYWWG
Heatsink surface connected to Pin 3
TO−220
MC
T SUFFIX
3x166T
CASE 314D AWLYWWG
1
5
Pin 1. Voltage Feedback Input
2. Switch Output
3. Ground
4. Input Voltage/VCC
5. Compensation/Standby
1
5
D2PAK
D2T SUFFIX
CASE 936A
MC
3x166T
AWLYWWG
Heatsink surface (shown as
terminal 6 in case outline
1
drawing) is connected to Pin 3
5
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 2 of this data sheet.
© Semiconductor Components Industries, LLC, 2005
October, 2005 − Rev. 7
1
Publication Order Number:
MC34166/D
1 page  
MC34166, MC33166
0
VCC
− 0.5
TA = +25°C
−1.0
−1.5
− 2.0
− 2.5
− 3.0
0
1.0 2.0 3.0 4.0
ISource, SWITCH OUTPUT SOURCE CURRENT (A)
5.0
Figure 8. Switch Output Source Saturation
versus Source Current
0
− 0.2 VCC = 12 V
Pin 5 = 2.0 V
− 0.4
Pins 1, 3 = GND
Pin 2 Driven Negative
− 0.6
GND
Isw = 100 mA
− 0.8 Isw = 10 mA
−1.0
−1.2
− 55
− 25 0 25 50 75 100
TA, AMBIENT TEMPERATURE (°C)
Figure 9. Negative Switch Output Voltage
versus Temperature
125
4.7
VCC = 12 V
Pins 1, 2, 3 = GND
4.5
4.3
4.1
3.9
− 55 − 25 0 25 50 75 100 125
TA, AMBIENT TEMPERATURE (°C)
Figure 10. Switch Output Current Limit
Threshold versus Temperature
160
Pin 4 = VCC
Pins 1, 3, 5 = GND
120
Pin 2 Open
TA = +25°C
80
40
0
0
10 20
30 40
VCC, SUPPLY VOLTAGE (V)
Figure 11. Standby Supply Current
versus Supply Voltage
6.5
6.0
Startup Threshold
VCC Increasing
5.5
Turn−Off Threshold
5.0 VCC Decreasing
4.5
4.0
− 55
− 25 0 25 50 75 100
TA, AMBIENT TEMPERATURE (°C)
125
Figure 12. Undervoltage Lockout
Threshold versus Temperature
40
30
20
Pin 4 = VCC
10 Pins 1, 3 = GND
Pins 2, 5 Open
TA = +25°C
0
0 10 20 30 40
VCC, SUPPLY VOLTAGE (V)
Figure 13. Operating Supply Current
versus Supply Voltage
http://onsemi.com
5
5 Page 
MC34166, MC33166
+
Oscillator
PWM
Thermal
3
ILIMIT
S
Q
R
UVLO
Vin
12 V
4
+
Cin
330
Q1
2
L
190 mH
D1
1N5822
Reference
+
EA
+
1
R1
2.4 k
5 CF RF
C1
0.47
4.7 k R2
0.047
3.3 k
VO
−12 V/1.0 A
CO
2200
Test
Conditions
Results
Line Regulation
Load Regulation
Output Ripple
Short Circuit Current
Efficiency
Vin = 8.0 V to 24 V, IO = 1.0 A
Vin = 12 V, IO = 0.1 A to 1.0 A
Vin = 12 V, IO = 1.0 A
Vin = 12 V, RL = 0.1 W
Vin = 12 V, IO = 1.0 A
3.0 mV = ± 0.01%
4.0 mV = ± 0.017%
80 mVpp
3.74 A
81.2%
L = Coilcraft M1496−A or General Magnetics Technology GMT−0223, 42 turns of #16 AWG
on Magnetics Inc. 58350−A2 core. Heatsink = AAVID Engineering Inc. 5903B, or 5930B.
Two potential problems arise when designing the standard voltage−inverting converter with the MC34166. First, the Switch Output emitter is
limited to −1.5 V with respect to the ground pin and second, the Error Amplifier’s noninverting input is internally committed to the reference and
is not pinned out. Both of these problems are resolved by connecting the IC ground pin to the converter’s negative output as shown in Figure 23.
This keeps the emitter of Q1 positive with respect to the ground pin and has the effect of reversing the Error Amplifier inputs. Note that the voltage
drop across R1 is equal to 5.05 V when the output is in regulation.
Figure 23. Voltage−Inverting Converter
3.0″
(Bottom View)
+
+
− VO +
+ Vin −
+
ÎÎÎÎÎÎÎÎÎÎRFÎÎÎÎÎÎÎÎÎÎCFÎÎÎÎÎ
+
(Top View)
Figure 24. Voltage−Inverting Converter Printed Circuit Board and Component Layout
+
+
http://onsemi.com
11
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet MC33166.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| MC33160 | MICROPROCESSOR VOLTAGE REGULATOR/ SUPERVISORY CIRCUIT |  Motorola Semiconductors |
| MC33160 | (MC33160 / MC34160) Voltage Regulator and Supervisory Circuit | ON Semiconductor |
| MC33161 | UNIVERSAL VOLTAGE MONITORS | Motorola Semiconductors |
| MC33161 | (MC33161 / MC34161) Universal Voltage Monitors | ON Semiconductor |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |