UM10389 36 W TLD application with UBA2014

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6 V, the controller enables the blocks voltage controlled oscillator (VCO), the Adaptive Non-overlap Time (ANT), the PReheat Timer (PRT), the Preheat current sensor (PCS), and the Lamp Voltage Sensor (LVS). To avoid overload of the key components, the maximum ignition voltage (Vlampmax) is limited and controlled by the LVS circuit (pin 13). This voltage is measured across externally connected resistor R14. UM10389 NXP Semiconductors 36 W TLD application with UBA2014 Revision history Rev Date Description 01 20091002 First issue, replaces application note AN10181 Contact information For more information, please visit: http://www. If the CS voltage reaches the CS+ level, the ACS circuit will take over the control of the lamp current. As the lamp voltage and lamp current of the 36 W TLD lamp are known (Vlamp = 102 V, Ilamp = 0. TO220 NXP Semiconductors UM10389_1 User manual Table 1. The average current is measured across a resistor (R14) and fed to pin 16 (CS−). The preheat time is defined by the capacitor connected to pin 1 (C12) and resistor R12 connected to pin 4. The ANT ensures that both power MOSFETs have the same on-time which is independent of the frequency. However, NXP Semiconductors does not give any representations or warranties, expressed or implied, as to the accuracy or completeness of such information and shall have no liability for the consequences of use of such information. NXP Semiconductors accepts no liability for inclusion and/or use of NXP Semiconductors products in such equipment or applications and therefore such inclusion and/or use is at the customer’s own risk. Vlamp during the ignition phase UM10389_1 User manual © NXP B. 2 Suitability for use — NXP Semiconductors products are not designed, authorized or warranted to be suitable for use in medical, military, aircraft, space or life support equipment, nor in applications where failure or malfunction of a NXP Semiconductors product can reasonably be expected to result in personal injury, death or severe property or environmental damage. Vlamp during the preheat, ignition, and burn phase UM10389_1 User manual © NXP B. 3 Trademarks Notice: All referenced brands, product names, service names and trademarks are the property of their respective owners. 15 Contents 16 Please be aware that important notices concerning this document and the product(s) described herein, have been included in section ‘Legal information’. The ignition voltage of the lamp is designed above the Vlampfail level. During this phase the capacitive mode protection ensures a safe operation of the power MOSFETs. Defining of some equations: UM10389_1 User manual © NXP B