HT7937 Built-in OVP White LED Step-up Converter Features · Integrated open-circuit protection · Over voltage protection · Up to 84% efficiency at VIN=3V, 3LEDs, · Low standby current: 0.
1mA (typ.
) (VSHDN=0V) · Matches LED current · Small value inductor and capacitors · Small outline SOT23-6 package ILED= 20mA · 1.
2MHz fixed switching frequency Applications · Cellular phones · PDAs · DSCs · Handheld devices · White LED display backlighting General Description The HT7937 is high efficiency boost converter with a constant current output to provide back light functions in handheld devices.
Applications with series connected LEDs ensure constant and identical LED currents resulting in uniform ...

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