isl97636 Intersil Corporation, isl97636 Datasheet - Page 16

• Manufacturer Part Number: isl97636
• Description: 8-channel Led Driver
• Manufacturer: Intersil Corporation

compensation network is a series Rc, Cc1 network from
COMP pin to ground and an optional Cc2 capacitor
connected to the COMP pin. The Rc sets the high frequency
integrator gain for fast transient response and the Cc1 sets
the integrator zero to ensure loop stability. For most
applications, Rc is in the range of 200Ω to 3kΩ and Cc1 is in
the range of 27nF to 37nF. Depending upon the PCB layout,
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ISL97636
a Cc2, in range of 100nF, may be needed to create a pole to
cancel the output capacitor ESR’s zero effect for stability.
The ISL97636 evaluation board is configured with Rc1 of
500Ω, Cc1 of 33nF, and Cc2 of 0, which achieves stability. In
the actual applications, these values may need to be tuned
empirically but the recommended values are usually a good
starting point.
May 9, 2008
FN6570.0