Part Number: LP8545 I have a backlight driver based on LP8545. The circuit is virtually identical to Typical Application (1) in the datasheet except Vsync is not used and tied to ground, FILTER is tied to ground with a 10k resistor, and PWM is tied to…
Part Number: LP8545 Other Parts Discussed in Thread: LP8556 , TPS61177 , TPS61187 Hi guys,
My customer wants to use the LP8545 but they have a question. They need to enable the Iset pin to set the current threshold, but according to the datasheet…
Hi Chris,
Default configuration of LP8545 uses VSYNC for reference clock to generate PWM. Since you are not using VSYNC, you should connect VSYNC pin and FILTER pin to GND to avoid internal PLL to locking some external noise etc. LP8545 will then…
Other Parts Discussed in Thread: LP8545 , LP8556 I have used the LP8545 on a design and like it. Have a new design where I have two LED strings. The load on each is about 110mA with a voltage of 8.1V to 9.3V. I think i can get there if I load share three…
Other Parts Discussed in Thread: LP8545 Hi all,
I am building a simple circuit to control an embedded-DisplayPort LCD screen (60Hz, LP097QX1-SPA1), using the LP8545 to power the backlight. May I ask if the Vsync signal on the LP8545 must be connected…
Hi,
I've attached the 2013 User's Guide for power products. Starting on page 53 you will find a selection of PWM controllers. many of these teh frequency can be varied according to external criteria.
As an example if you use a UC3842 it is a simple…
Gary,
Most any of our power controllers with dual output capability will provide the control. See attached document starting at page 50 with the dual output controllers on page 53 and 54 and choose what features you want.
Regards,
John
