MAX16818_09 Datasheet, PDF (8/25 Pages) Maxim Integrated Products – 1.5MHz, 30A High-Efficiency, LED Driver with Rapid LED Current Pulsing

1.5MHz, 30A High-Efficiency, LED Driver
with Rapid LED Current Pulsing
Pin Description (continued)
PIN
NAME
FUNCTION
21
CSP
Current-Sense Differential Amplifier Positive Input. The differential voltage between CSN and CSP is
amplified internally by the current-sense amplifier (gain = 34.5) to measure the inductor current.
23
SENSE- ^{Differential LED Current-Sensing Negative Input. SENSE- is used to sense the LED current. Connect}
SENSE- to the negative side of the LED current-sense resistor.
24
SENSE+ ^{Differential LED Current-Sensing Positive Input. SENSE+ is used to sense the LED current. Connect}
SENSE+ to the positive side of the LED current-sense resistor.
26
IN
Supply Voltage Connection. Connect IN to V_CC for a +5V system.
27
V_CC
Internal +5V Regulator Output. V_CC is derived from the IN voltage. Bypass V_CC to SGND with 4.7µF
and 0.1µF ceramic capacitors.
Supply Voltage for Low-Side and High-Side Drivers. Connect a parallel combination of 0.1µF and 1µF
28
V_DD
ceramic capacitors to PGND and a 1Ω resistor to V_CC to filter out the high peak currents of the driver
from internal circuitry.
—
EP
Exposed Paddle. Connect the exposed paddle to a copper pad (SGND) to improve power
dissipation.
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