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PDF MV1001SC Data sheet ( Hoja de datos )

Número de pieza MV1001SC
Descripción LED Driver IC
Fabricantes SHINDENGEN 
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LED driver IC
CAT.No.1A0102-1E
MV1001SC
Application Note
Version 3.0

1 page




MV1001SC pdf
MV1001SC
1. Overview
1.1 Features
The MV1001SC is an LED driver IC that can be operated through bus voltage direct. 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 MV1001SC 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 MV1001SC 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.
Compatible with Glow wall switch
Allows LED open-circuit protection using auxiliary winding.
Features built-in thermal shutdown, UVLO, and LED short-circuit protection.
Can be operated through bus voltage direct.
1.2 Block diagram
JFET
Zero Current
ON
Vcc
Detection
Trigger
OVP
Bandgap
Vreg=5V(typ)
TSD
Restart
Timer
OVP UVLO
SR
Q
UVLO
Dimming
Vth_CS
STOP Signal
OFF
Trigger
Control
Logic
LEB
Latch Signal
Vcc
Level
Shift
Gate
Drive
CAT.No.1A0102-1E
4

5 Page





MV1001SC arduino
MV1001SC
Table 1 Recommended MOSFETs (as of January 2015)
Product name
Withstand
voltage (V)
Id (A)
Ron (typ) Ron (max) Qg (nC) Ciss (pF) Coss (pF) Manufacturer Package
P3B28HP2
280
3 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 0.495
Ip 2Io(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.1A0102-1E
10

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