mg39u301 Megawin Technology, mg39u301 Datasheet
![no-image](/images/no-image-200.jpg)
mg39u301
Related parts for mg39u301
mg39u301 Summary of contents
Page 1
... Provide constant frequency or constant off-time control 2 Description The MG39U301 is a current feedback control, buck type LED driver IC. It achieves good output current regulation without the need of external compensation components. The MG39U301 integrates a HV start-up circuit, 7~450V linear regulator, precision comparator, PWM control and ring oscillator into one chip ...
Page 2
... Linear dimming input. If current sense threshold is required less than 0.25V, an external voltage can be applied to this pin. Ring oscillator bias input. When RT is connected to ground via a resistor, the MG39U301 operates in constant frequency mode. When the resistor is connected between RT & GATE, the MG39U301 operates in constant off-time mode. No connection 8 ...
Page 3
... Block Diagram Regulator VIN - 0.25V - GND 7 Application Circuit Buck Driver Example 1 V INDC 10uF/400V R VIN MEGAWIN ULVO POR Q Blanking R S Oscillator Constant Frequency R OSC MG39U301 MG39U301 Datasheet VDD RST GATE PWM RT V LED ...
Page 4
... Buck Driver Example 2 V INDC 10uF/400V R VIN 8 Absolute Maximum Rating Parameter Supply Voltage Ambient Operating Temperature Storage temperature 4 Constant Off-time R OSC MG39U301 Rating -0.5 to +470 -40 to +125 -55 to +155 MG39U301 Datasheet Unit V °C °C LED MEGAWIN ...
Page 5
... =5.5V PWM DD D PWM V Ta= 0°C to +125°C, CSTH VDD = 5.6V Ta= -40°C, VDD = 5. =0. =VDD BLANK =VDD DELAY LD CS CSTH +50mV after t BLANK MG39U301 Datasheet Min. Typ. Max 450 - 0.5 0.8 - 0.8 1.2 =226K, 5.0 5 5.30 - 100 300 500 2 0.8 50 100 150 ...
Page 6
... Electrical Characteristics (continued) V GATE (H) V GATE ( VDD-0.4V GATE (H) GATE 0.4V GATE (L) GATE 500pF RISE GATE 500pF FALL GATE 1.0MΩ OSC OSC R = 226KΩ OSC MG39U301 Datasheet VDD - - 22K 27K 32K Hz 90K 110K 120K ...
Page 7
... Package Dimension 10.1 SOP8 Package Dimension MEGAWIN MG39U301 Datasheet 7 ...
Page 8
... SOP16 Package Dimension 8 MG39U301 Datasheet MEGAWIN ...
Page 9
... Revision History Revision V1.01 Initial release MEGAWIN Description MG39U301 Datasheet Date Page 2011/10/03 9 ...