|
|
PDF MV1012SC Data sheet ( Hoja de datos )
| Número de pieza | MV1012SC | |
| Descripción | LED Driver IC | |
| Fabricantes | SHINDENGEN | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de MV1012SC (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
|
No Preview Available !
LED driver IC
CAT.No.1A0602-1E
MV1012SC
Application Note
Version 1.0
1 page  
MV1012SC
1. Overview
1.1 Features
The MV1012SC is an LED driver IC that uses an external power supply and can consist solely of low-voltage pins.
Omitting the auxiliary winding enables a single power supply configuration, and quasi-resonant operation in critical
conduction mode raises efficiency and lowers noise.
In general critical conduction mode, the switching frequency increases when the dimming ratio decreases. This
increases switching losses and imposes limitations on the lowest dimming ratios, disadvantageously. When the dimming
ratio decreases, the MV1012SC automatically switches from critical conduction mode to discontinuous conduction mode.
This prevents the switching frequency increasing, reduces switching losses, and achieves smooth and deep dimming free
of flickering. The MV1012SC can stop gate output by holding the VREF at or below the oscillation-off REF pin threshold
voltage (Vth_REF_sp).
The MV1012SC has the following features:
Allows quasi-resonant operation without auxiliary winding.
Quasi-resonant operation in critical conduction mode helps achieve low input change, raises efficiency, and lowers
noise.
Off-time modulation enables deep dimming (1% or less).
Allows PWM dimming input and linear dimming input.
Gate output stop at VREF=< Vth_REF_sp.
Allows LED open-circuit protection using auxiliary winding.
Features UVLO, and LED short-circuit protection.
Allows configuration solely of low voltage pins using an external start-up circuit.
1.2 Block diagram
Ｚｅｒｏ Ｃｕｒｒｅｎｔ
ON
Vcc
Ｄｅｔｅｃｔｉｏｎ
Trigger
OVP
Bandgap
Vreg=5V(typ）
Restart
Timer
OVP UVLO
SR
Q
UVLO
Dimming
Vth_CS
STOP Signal
STOP Signal
Vth_REF_sp
OFF
Trigger
Control
Logic
LEB
Latch Signal
Vcc
Level
Ｓhift
Gate
Drive
CAT.No.1A0602-1E
4
5 Page 
MV1012SC
Table 1 Recommended MOSFETs (as of January 2015)
Product name
P3B28HP2
Withstand
voltage (V)
280
Id (A)
3
Ron (typ) Ron (max) Qg (nC) Ciss (pF) Coss (pF) Manufacturer Package
1.7
2
3.6 120
25 Shindengen FB
P6B28HP2
6 0.66 0.85 5.7 240
43 Shindengen FB
P1R5B40HP2
400
1.5 4.2
5
3.9 120
20 Shindengen FB
P4B40HP2
4 1.54 1.9 6.5 245 33 Shindengen FB
P1B52HP2
525
1
6
7.2 4.3 125 20 Shindengen FB
P5B52HP2
5 1.4
1.7 10.5 400
45 Shindengen FB
P6B52HP2
6 1.1
1.35 15 520
58 Shindengen FB
P0R5B60HP2
600
0.5 8.3
10 4.3 120 18 Shindengen FB
3.2.2 Fly-wheel diode (D1)
Just as with MOSFETs, the fly-wheel diode must have withstand voltage greater than the input voltage. Additionally,
select a fast recovery diode (FRD) suitable for high-speed switching with trr of around 100 nsec or less. (See Table 2
Recommended fly-wheel diodes.)
Table 2 Recommended fly-wheel diodes (as of January 2015)
Product name
Withstand
voltage (V)
Io (A)
VF (V) Cj (pF)
D1FL20U
D2FL20U
1.1 0.98
-
200
1.5 0.98
-
D1FL40U
D2FL40
1.5 1.2 11
400
1.3 1.3
-
D1FK60
D2FK60
0.8 1.3 11
600
1.5 1.3 16
trr (ns)
35
35
25
50
75
75
Manufacturer Package
Shindengen
Shindengen
Shindengen
Shindengen
Shindengen
Shindengen
1F
2F
1F
2F
1F
2F
3.2.3 Current detection resistor (R1 and R2)
The current detection threshold of the CS pin should be Vth_CS = 0.495 V, and R1/R2 = Rcs. In Figure 5, when toff2 is
significantly less than ton or toff1, the peak current of Id, Ip, is double the output current Io. Thus, the Rcs is calculated
using the output current when the dimming ratio is 100%, Io (max), as follows:
Rcs
Vth_CS
Ip
0.495
2 Io(max)
In actual use, the current will vary slightly from the calculated value due to toff2 and detection delay. Adjust to the
appropriate resistance with the actual apparatus.
CAT.No.1A0602-1E
10
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet MV1012SC.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| MV1012SC | LED Driver IC | SHINDENGEN |
| 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 |