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PDF NR111D Data sheet ( Hoja de datos )
| Número de pieza | NR111D | |
| Descripción | Light Load High Efficiency Current Mode Step-Down 4A Switcing Regulator IC | |
| Fabricantes | SANKEN | |
| Logotipo |  |
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Light Load High Efficiency,31V, Current Mode Step-Down 4A Switcing Regulator IC
NR111D
Oct./17/2013
General Descriptions
The NR111D is buck regulator ICs integrates High-side
power MOSFETs. The feature increasing efficiency at light
loads allows the device to be used in the energy-saving
applications. With the current mode control, ultra low ESR
capacitors such as ceramic capacitors can be used. The ICs
have protection functions such as Over-Current Protection
(OCP), Under-Voltage Lockout (UVLO) and Thermal
Shutdown (TSD). An adjustable Soft-Start by an external
capacitor prevents the excessive inrush current at turn-on.
The ICs integrate phase compensation circuit which reduces
the number of external components and simplifies the
design of customer application. The ON/OFF pin (EN Pin)
turns the regulator on or off and helps to achieve low power
consumption requirements. The NR111D is available in an
8-pin DIP package.
Features & Benefits
Current mode PWM control
Up to 94% Efficiency,
Up to 68% Efficiency at IO = 20mA Light Load
Stable with low ESR ceramic output capacitors
Built-in protection function
Over Current Protection (OCP)
Thermal Shutdown (TSD)
Under Voltage Lockout (UVLO)
Built-in phase compensation
Adjustable Soft-Start with an external capacitor
Turn ON/OF the regulator function
DIP8 Package
BS
IN
SW
GND
NR111D
SS
EN
Iset
FB
Electrical Characteristics
4A output current
Operating input range VIN = 6.5V～31V
Output adjustable VO= 0.8V～24V
Fixed 350kHz frequency
Applications
LCD TV / Blu-Ray / Set top box
Home appliance
Green Electronic products
Other power supply
Package
Typical Application Circuit
VIN R3
VIN_s
C2 C1
GND
2
R1 IN
7
EN
C10
1
BS 3
SW
L1
NR11111DE
R5
8
SS
GND
5
FB
ISET
R4
46
C9
R7 R6
D1
C1, C2: 10μF / 35V
C4, C5: 22μF / 16V
C9: 0.1μF
C10: 0.1μF
SW
R1: 1.7MΩ
L1: 10μH
R3: 22Ω
R4: 18kΩ, R5: 2.7kΩ (Vo=5.0V)
R6: 3.9kΩ
Vo
Vo_s
C4 C5
GND
Rev.1.1
SANKEN ELECTRIC CO., LTD.
http://www.sanken-ele.co.jp
1
http://www.Datasheet4U.com
1 page  
Light Load High Efficiency,31V, Current Mode Step-Down 4A Switcing Regulator IC
NR111D
Oct./17/2013
(2)OutpuNtRs1t1a4rtK-uUpVLOoad=CR
Vo=3.3V L=47uH
7.0
6.5
6.0
VO=3.3V
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0 8.5 9.0 9.5 10.0
Input voltVaIgNe[V]VIN [V]
6.00
5.50
5.00
4.50
4.00
3.50
3.00
2.50
2.00
1.50
1.00
0.50
0.00
0.0
(N5R)1O1v0eKr/1c1u1rrKeOntCpPr.otection
Vo=5.0V L=10uH
ISET=OPEN
VIN=12V
15V
20V
24V
ISET=SHORT
1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0
Output cuIorr[eAn] t IO [A]
5.1
5.08
5.06
5.04
5.02
5
4.98
4.96
4.94
4.92
4.9
0
(3)Load Regulation : VLoad
Vin=8v
12v
24v
123
Output current IO [A]
(6) Supply current : IIN
NR11A4Kt /N1o1-5lKoa,NdR116K,NRV1O1=7K5.I0QV
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
4
0.0 5.0 10.0 15.0 20.0 25.0 30.0
Input volVtIaNg[Ve] VIN [V]
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
-0.05
-0.10
0.0
(4)Shut down supply current : IIN(off)
NR110K,111K,114K,115K,116K,117K
VENIQ=_0oVff
5.0 10.0 15.0 20.0 25.0 30.0
Input volVtaINg[eV] VIN [V]
500
480
460
440
420
400
380
360
340
320
300
280
260
240
220
200
0.0
(7) Switching Frequency : fsw
NR110K focs
Vo=3.3V L=10uH
1.0 2.0 3.0 4.0
OutpuIto c[Au]rrent IO [A]
5.0
Rev.1.1
SANKEN ELECTRIC CO., LTD.
http://www.sanken-ele.co.jp
5
5 Page 
Light Load High Efficiency,31V, Current Mode Step-Down 4A Switcing Regulator IC
NR111D
Oct./17/2013
Package outline & Dimension
An outside size is supplied by either Package type A or Package type B.
Package A
9.4±0.127
NR111D *1
*4 SK
*2
*3
6.35±0.127
（1.524）
3.302±0.127
0.381min
3.302±0.254
（2.54）
PIN Assignment
1.NC
2.IN
3.SW
4.GND
5.FB
6.EN
7.SS
8.BS
（1.524）
（1.524）
0.356~0.559
Note:
1) Dimension is in millimeters.
2) Drawing is not to scale.
7.938±0.3175
6.35±0.127
0.2032~0.3810
8.636±0.762
Mariking
*1. Type number
*2. Lot number (three digit)
1st letter: The last digit of year
2nd letter: Month
(1 to 9 for Jan. to Sept.,
O for Oct. N for Nov. D for Dec.)
3rd letter week
01～03：Arabic Numerical
*3. Control number (four digit)
*4 .Logo: SK
Rev.1.1
SANKEN ELECTRIC CO., LTD.
http://www.sanken-ele.co.jp
11
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet NR111D.PDF ] | |
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