|
|
PDF NCP81234 Data sheet ( Hoja de datos )
| Número de pieza | NCP81234 | |
| Descripción | Dual-Channel/Two-Phase Controller | |
| Fabricantes | ON Semiconductor | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de NCP81234 (archivo pdf) en la parte inferior de esta página. Total 19 Páginas | ||
|
No Preview Available !
NCP81234
Dual-Channel/Two-Phase
Controller for DrMOS
The NCP81234, a dual−channel/two−phase synchronous buck
controller, provides flexible power management solutions for
applications supported by DrMOS. Operating in high switching
frequency up to 1.2 MHz allows employing small size inductor and
capacitors.
Features
• Single Vin = 4.5 ~ 20 V with Input Feedforward
• Integrated 5.35 V LDO
• Vout = 0.6 V ~ 5.3 V
• Fsw = 200 k ~ 1.2 MHz
• PWM Output Compatible to 3.3 V and 5 V DrMOS
• Dual−Channel or Two−Phase Operation
• DDR Power Mode Option
• Interleaved Operation
• Differential Current Sense Compatible for both Inductor DCR Sense
and DrMOS Iout
• 2 Independent Enables with Programmable Input UVLO
• Programmable DrMOS Power Ready Detection (DRVON)
• 2 Power Good Indicators
• Comprehensive Fault Indicator
• Externally Programmable Soft Start and Delay Time
• Programmable Hiccup Over Current Protection
• Hiccup Under Voltage Protection
• Recoverable Over Voltage Protection
• Hiccup Over Temperature Protection
• Thermal Shutdown Protection
• QFN−28, 5x5 mm, 0.5 mm Pitch Package
• This is a Pb−Free Device
Typical Applications
• Telecom Applications
• Server and Storage System
• Multiple Rail Systems
• DDR Applications
www.onsemi.com
1 28
QFN28
MN SUFFIX
CASE 485BQ
MARKING DIAGRAM
1
XXXXXXXX
XXXXXXXX
AWLYYWWG
G
XXXXX = Specific Device Code
A = Assembly Location
WL = Wafer Lot
YY = Year
WW = Work Week
G = Pb−Free Package
(Note: Microdot may be in either location)
PINOUT
28 27 26 25 24 23 22
1 VIN
2 EN1
3 EN2
4 DRVON
5 PGOOD1
6 PGOOD2
7 FAULT
GND
29
ISP1 21
ISN1 20
ISP2 19
ISN2 18
PWM2 17
FB2 16
COMP2 15
8 9 10 11 12 13 14
(Top View)
ORDERING INFORMATION
Device
Package
Shipping†
NCP81234MNTXG QFN28
5000 /
(Pb−Free) Tape & Reel
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specification
Brochure, BRD8011/D.
© Semiconductor Components Industries, LLC, 2015
November, 2015 − Rev. 0
1
Publication Order Number:
NCP81234/D
1 page  
NCP81234
VIN
VTEMP1
VCC5V
VREF
VIN
ILMT1
OTP1
PWM1
ISP1
ISN1
ISP1
ISN1
PWM2
VTEMP1
NCP81234
ISP2
ISN2
ISP2
ISN2
VIN
PWM
TOUT
NCP81293
VSWH
REFIN
IOUT
CGND
PGND
VIN
PWM
TOUT
NCP81293
VSWH
REFIN
IOUT
CGND
PGND
DLY1
SS
CNFG
FSET
FB1
COMP1
Vout1
ISP1
ISN1
VIN
ISP2
ISN2
Vout1
VCC5V
EN1
PGOOD1
EN1
PGOOD1
EN2
GND
Figure 3. Typical Two−Phase Application Circuit for DrMOS with Integrated Current Sense and Temperature Sense
www.onsemi.com
5
5 Page 
NCP81234
Table 3. ELECTRICAL CHARACTERISTICS (VIN = 12 V, typical values are referenced to TA = 25°C, Min and Max values are
referenced to TA from −40°C to 125°C. unless other noted.)
Characteristics
Test Conditions
Symbol Min Typ Max Unit
PWM MODULATION
Minimum On Time
Minimum Off Time
0% Duty Cycle
(Note 7)
Ton_min
50 ns
(Note 7)
Toff_min
160
ns
COMP voltage when the PWM outputs
remain Lo (Note 7)
1.3 V
100% Duty Cycle
Ramp Feed−forward Voltage Range
COMP voltage when the PWM outputs
remain HI, Vin = 12.0 V (Note 7)
(Note 7)
2.5
4.5
20
V
V
PWM OUTPUT
PWM Output High Voltage
Isource = 0.5 mA
VPWM_H VCC−0.2
V
PWM Output Low Voltage
Isink = 0.5 mA
VPWM_L
0.2 V
Rise and Fall Times
CL (PCB) = 50 pF, measured between
10% & 90% of VCC (Note 7)
10 ns
Leakage Current in Hi−Z Stage
ILK_PWM
−1.0
1.0 mA
Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product
performance may not be indicated by the Electrical Characteristics if operated under different conditions.
7. Guaranteed by design, not tested in production.
Table 4. RESISTOR OPTIONS FOR FUNCTION PROGRAMMING
Resistance Range (kW)
Resistor Options (kW)
Min Typ Max ±5%
±1%
2.565
2.7 2.835 2.7
2.61 2.67 2.74
4.845
5.1 5.355 5.1
4.87 4.99 5.11
7.79 8.2 8.61 8.2 7.87 8.06 8.25
12.35
13 13.65 13
12.4 12.7
13
19 20 21 20 19.1 19.6 20
31.35
33 34.65 33
31.6 32.4 33.2
2.80
5.23
8.45
13.3
20.5
34
www.onsemi.com
11
11 Page | ||
| Páginas | Total 19 Páginas | |
| PDF Descargar | [ Datasheet NCP81234.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| NCP81230H | Precise Low Voltage Synchronous Buck Controller | ON Semiconductor |
| NCP81232 | Dual-Channel/Multi-Phase Controller | ON Semiconductor |
| NCP81232MNTXG | Dual-Channel/Multi-Phase Controller | ON Semiconductor |
| NCP81234 | Dual-Channel/Two-Phase Controller | 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 |