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PDF DN05022 Data sheet ( Hoja de datos )
| Número de pieza | DN05022 | |
| Descripción | Low-Cost LED Dimming | |
| Fabricantes | ON Semiconductor | |
| Logotipo |  |
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DN05022/D
Low-Cost LED Dimming
with Output Capacitor
Table 1. DEVICE DETAILS
Device
Application
NSIC2050B,
NSI50010Y
AC LED, Dimmable
Input Voltage
100−127 Vac
http://onsemi.com
DESIGN NOTE
Topology
Bridge + CCR and PWM Sensing
I/O Isolation
No
Circuit Description
This circuit can be thought of as having two separate
portions. There is an LED management portion and
a dimmer management/PWM Signal portion.
The LED management portion charges the output
capacitor to run the LEDs in a “DC” state. The dimmer
management portion provides loading current for the
TRIAC in a dimmer and provides a gate voltage to the
series-pass MOSFET. The gate drive of the series MOSFET
PWMs the LEDs at their peak current rating. The
NSIC2050B Constant Current Regulators regulate the
2 × BAS21SL
Vin
current through the LEDs. The NSI50010Y limits the power
consumption of the dimmer management circuit.
For optimal performance, the gate voltage of the
MOSFET (driven by the voltage divider of the 11 kW and
1.5 kW resistors) needs to be equal to the threshold voltage
when the input voltage to the circuit is at the dimmer’s
minimum conduction angle.
Also, some dimmers may require more than 10 mA of
loading current, so the NSI50010Y may be replaced with
another CCR such as the NSIC2020B (20 mA CCR), though
power consumption will increase.
2 × NSIC2050B
100 W
2W
3.3 mF
250 V
60 V
3 × Cree MX−6S
BAV23CL
NSI50010Y
1.5 kW
1/4 W
11 kW
1/2 W
MTD6N20E
BZX84C15L
Figure 1. LED Lighting with CCRs, Dimmable Interface
© Semiconductor Components Industries, LLC, 2013
October, 2013 − Rev. 2
1
Publication Order Number:
DN05022/D
1 page | ||
| Páginas | Total 2 Páginas | |
| PDF Descargar | [ Datasheet DN05022.PDF ] | |
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