Sp1903 ultra high pressure linear constant current bulb lamp drive
brief introduction
Sp1903 is a PWM dimming ultra-high voltage linear LED Driver IC
Maximum input voltage up to 400V, suitable for driving high voltage and small current
LED load application scheme has few external components, compact layout and simple function
It can be flexibly applied to all kinds of small volume or fir type LED products,
A simple linear drive mode requires magnetic components to avoid EMI interference.
Sp1903 integrates PWM dimming function, and the dimming depth can reach 1% at most
Integrated constant flow rate adjustment function to save the overall BOM of customers
This, sp1903 is a groundbreaking integrated high-pressure regulator, which can
Connected to supply power for MCU and other PWM signal modules
In order to prevent IC overheating and damage, 1903 integrates intelligent temperature control function,
When the internal junction temperature of IC rises to 132 ℃, sp1903 starts to reduce the transmission
When the junction temperature reaches 162 ℃, the output current will be reduced to 0,
This can avoid the flicker problem of traditional over temperature protection.
Application scope
LED bulb lamp
LED lamp tube
Other LED lights
characteristic
20V ~ 400V working voltage
Minimum 1% PWM dimming depth
Maximum 140mA peak output current
± 5% output current accuracy
Multiple ICs can be used in parallel to meet the needs of large current output.
Integrated high voltage regulator to supply small current intelligent components
Integrated constant flow rate regulation function
High efficiency factor
high efficiency
Few peripheral components
Led open circuit short circuit protection
Intelligent over temperature protection and energy treatment
TJ > 132 ℃, the output current begins to decrease
TJ > 162 ℃, output current reduced to 0
ESOP-8