Switch Tricks Electronic Ballast ICs Into Working On Low Voltages

by T.A. Babu, electronics consultant, Chennai, India, Electronic Design, Jun 12 2008

Focus:
Half-bridge gate driver ballast ICs with undervoltage lockout (UVLO) on the high-side output need a VCC of at least 12 V to operate properly. When the ballast operates from a 12 V battery a boost dc-dc converter is recommended. However,a simpler alternative solution uses a DPDT switch a capacitor and an auxiliary transformer winding to obtain the necessary supply voltage.

What you’ll learn:

• How to power a lamp ballast IC off of a 12-V battery

Notes:
ED's Ideas For Design

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