Preamplifier fly height control (FHC) driver and sensing circuit

A method for managing temperature of a device which receives variable power for a first and second operation mode, the method comprising:

• determining power variance for said first and second operation modes;
• and
• delivering a compensation power equivalent to said power variance to a heater for increasing temperature of said device, said compensation power is based on a delivery voltage, delivery current and resistance of said heater;
• said compensation power is cooperable with a corresponding operation mode power for providing approximately equivalent device temperature for each of said first and second operation modes;
• and
• maintaining said delivery voltage at a constant voltage, wherein said delivery current is varied corresponding to a variance in resistance of said heater.

A method for managing temperature of a device which receives variable power for a first and second operation mode, the method comprising:

• determining power variance for said first and second operation modes;
• and
• delivering a compensation power equivalent to said power variance to a heater for increasing temperature of said device, said compensation power is based on a delivery voltage, delivery current and resistance of said heater;
• said compensation power is cooperable with a corresponding operation mode power for providing approximately equivalent device temperature for each of said first and second operation modes;
• and
• determining a resistance of said heater, wherein said heater resistance varies with temperature;
• and
• adjusting said delivery current for maintaining said compensation power based on said determined resistance, wherein said delivery voltage is maintained constant.