T
treez
Guest
Hi,
We are designing a 6w LED driver using a HV9910B Driver IC, and an external error amplifier comprising a MCP6001 which drives the “LD” pin of the HV9910B. The control range for the LD pin of the HV9910B is from 0V to 0.25V…As such, the error amp’s output range for control will obviously be between 0v and 0.25V…this is very low, and even though the MCP6001 is said to be “Rail to rail input /output”, do you think this is too low?
Should we put say two forward biased diodes between the MCP6001’s output and the LD pin, to raise up the voltage of the MCP6001 output as it controls the HV9910B?
HV9910B datasheet:
https://ww1.microchip.com/downloads/en/DeviceDoc/20005344A.pdf
MCP6001 datasheet:
**broken link removed**
We are designing a 6w LED driver using a HV9910B Driver IC, and an external error amplifier comprising a MCP6001 which drives the “LD” pin of the HV9910B. The control range for the LD pin of the HV9910B is from 0V to 0.25V…As such, the error amp’s output range for control will obviously be between 0v and 0.25V…this is very low, and even though the MCP6001 is said to be “Rail to rail input /output”, do you think this is too low?
Should we put say two forward biased diodes between the MCP6001’s output and the LD pin, to raise up the voltage of the MCP6001 output as it controls the HV9910B?
HV9910B datasheet:
https://ww1.microchip.com/downloads/en/DeviceDoc/20005344A.pdf
MCP6001 datasheet:
**broken link removed**