ISL97632 Intersil Corporation, ISL97632 Datasheet
ISL97632
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ISL97632 Summary of contents
Page 1
... DC manner in 32 linear steps pin can be used to provide a zero brightness setting or shutdown power saving function. The ISL97632 is available in the 8 Ld DFN (2mmx3mm) package. There are 14V, 18V, and 26V OVP options that are suitable for 3, 4, and 6 LEDs backlight applications respectively. The ISL97632 is specified for operation over the -40° ...
Page 2
... EN = 3V, enabled, not switching EN = 0V, disabled ILX = 100mA VLX = 28V Serial interface setting = 15 (center) Serial interface setting = 0,1..31) Serial interface setting = 0 VFB = 95mV IDIODE = 100mA +25°C A ISL97632IRT14Z ISL97632IRT18Z ISL97632IRT26Z SDIN = low SDIN = low SDIN = low SDIN = high θ θ (°C/ MIN TYP MAX 2 ...
Page 3
... EN 4 SDIN FBSW 7 VOUT ISL97632 L EN ISL97632 PWM LOGIC FET CONTROLLER DRIVER CURRENT SENSE GM AMPLIFIER 10 - 186mV SERIAL INTERFACE Ground Pin. Connect to local ground. Input Supply Pin. Connect to the input supply voltage, the inductor and the input supply decoupling capacitor. ...
Page 4
... The ISL97632 uses a simple single-wire serial interface for programming the output brightness of the LEDs. A 5-bit interface is used to give a total of 32 levels of output brightness. The interface uses a normally high connection for use with open-drain driving schemes and Intersil’s proprietary XSD bus. When held low for between 15µ ...
Page 5
... IN 4 LEDs OUT (10µ LEDs OUT (22µ 3. LEDs OUT (22µ (mA) OUT FIGURE 2. EFFICIENCY vs LED CURRENT 20.08 20.04 20.00 19.96 19. (V) OUT FIGURE 4. LOAD REGULATION (V 5 ISL97632 1 0.8 0.6 0 FIGURE 3. QUIESCENT CURRENT vs V 19.76 19.74 19.72 19.70 19.68 19.66 19.64 19. 4V 4.7Ω 35 SET ...
Page 6
... The internal compensation and the highly integrated functions of the ISL97632 make it a design friendly device to be used in high volume high reliability applications. goes low due to one or more LEDs which are OUT ⋅ ...
Page 7
... When the internal switch turns off, the source of M1 will be pulled up by the follower action of M1, limiting the maximum voltage on the ISL97632 LX pin to below Vin, but allowing the output voltage to go much higher than the breakdown limit on the LX pin. The switch current limit and ...
Page 8
... IN The SEPIC works as follows; assume the circuit in Figure 10 operates normally when the ISL97632 internal switch opens and the PWM off state after a short duration where few LC time constants elapsed, the circuit is considered in the steady-state within the PWM off period that L1 and L2 are shorted ...
Page 9
... However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. For information regarding Intersil Corporation and its products, see www.intersil.com 9 ISL97632 L8.2x3A 0.15 C ...