Part Number: LP8553 Hi Dear,
The customer is making an electronic paper book product and is looking for an IC that can light up the backlight in the picture below. They need DC dimming, 4 channels, and 9 LED strings. Is there a recommended model
Part Number: LP8553 Hi TI,
I recently have the audible noise from this device, the PWM frequency setting shows how to configure through registers, PWM_RES and PWM_FREQ, but this can adjust up to 19.2kHz.
Refer to the section PWM Interface Characteristics…
Part Number: LP8553 Other Parts Discussed in Thread: LP8552 , LP8556 Hi TI,
I have multiple applications are possible to use this LP8553, which have 1, 2 and 4 channels.
So do you have a recommendation how to assign the channels?
Refer to your first comment…
Part Number: LP8553 I have my circuit connected in the same way as the Typical Application for Low Input Voltage on Page 2 of the datasheet as I am using 5V input on Vbatt, Vin, Vldo. I have a 160Hz PWM input to the PWM input pin. However, I am seeing…
Part Number: LP8553 Hi TI,
Refer to datasheet page 2, there is a low power voltage diagram.
I am planning to use 3.3V for the Vbatt, but the Vin and VLDO are tied to +5V, plus footnote mentioned 5V rail can be used to improve efficiency for the application…
Part Number: LP8553 Other Parts Discussed in Thread: LP8556 Hi Team, We have a customer looking for a 4-channel PWM to analog controller WLED Driver for medical applications. Here is the requirement of our customer: Vin: 5V Channels: at least 4 Min. LED current…
Part Number: LP8553 Other Parts Discussed in Thread: LP8557 , Hi Sir,
Could you please share the efficiency data of LP8553 & LP8557 which with VIN 3.4v~4.3v? Customer would like to know the information.
Thanks,
George
Part Number: LP8553 Data sheet of LP8553 shows a max boost conversion ratio of 10 with Fsw = 1.25 MHz. Can this range be increased by reducing the switching frequency? If limit is due to a min off-time requirement, then reducing the frequency might increase…
Part Number: LP8553 Posting for a colleage:
Can this device support low ESR electrolytics for Cout? We are running into audible noise issues with a 20mA load on this device. Currently looking into playing with the switching frequency, inductor and capacitor…
Other Parts Discussed in Thread: LP8553 , LP8552 Hi,
Can LP8553 be used as 3 channel LED driver? Could you let me know how to use LP8553 as 3 channel LED driver, please?
35mA is needed per 1ch.
Best regards, Shimizu
