ISL97682 Ver la hoja de datos (PDF) - Intersil
Número de pieza
componentes Descripción
fabricante
ISL97682 Datasheet PDF : 17 Pages
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ISL97682, ISL97683, ISL97684
Pin Descriptions
PIN ISL97682 ISL97683 ISL97684
DESCRIPTION
1 AGND
AGND
AGND Analog Ground for precision circuits
2 COMP
COMP
COMP External Compensation Pin
3 RSET
RSET
RSET Resistor connection for setting LED current, (see Equation 2 for calculating the ILEDpeak)
4
FSW
FSW
FSW FSW = 0 ~ 0.25 * VDC, Boost Switching Frequency = 600kHz with phase shift and PFM mode enabled.
FSW = 0.25 * VDC ~ 0.5 * VDC, Boost Switching Frequency = 600kHz with phase shift and PWM mode
enabled.
FSW = 0.5 * VDC ~ 0.75 * VDC, Boost Switching Frequency = 1MHz with phase shift and PWM mode
enabled.
FSW = 0.75 * VDC ~ VDC, Boost Switching Frequency = 1MHz with phase shift and PFM mode enabled.
5 PWMI
PWMI
PWMI PWM brightness control pin.
6
EN
EN
EN
Enable, can be tied directly to VIN if the system lacks of I/O
7
VIN
VIN
VIN LED and Driver Supply Voltage. LED supply and Driver supply can be separated if high voltage application
is needed and dual supplies are available
8 FPWM/ FPWM/ FPWM/ External PWM dimming with frequency modulation or Direct PWM dimming without frequency
DirectPWM DirectPWM DirectPWM modulation.
With a resistor connected to ground, the dimming frequency will be set by the Setting Resistor.
When this pin is floating, the part enters Direct PWM mode such that the dimming follows the input PWM
signal without frequency modulation.
9
LX
LX
LX
Input to boost switch
10 PGND
11 VDC
PGND
VDC
PGND
VDC
Power ground (LX, CIN, and COUT Power return)
De-couple capacitor for internally generated 5V supply
12 OVP
OVP
OVP Overvoltage protection input
13 CH1
CH1
CH1 Input 1 to current source, CH, and monitoring
14
NC
CH2
CH2 Input 2 to current source, CH, and monitoring (ISL97682 is No Connect)
15 CH2
CH3
CH3 Input 3 to current source, CH, and monitoring
16
NC
NC
CH4 Input 4 to current source, CH, and monitoring (ISL97682, ISL97683 are No Connect)
4
FN7689.0
March 11, 2011
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