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L6585DE Arkusz danych(PDF) 6 Page - STMicroelectronics |
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L6585DE Arkusz danych(HTML) 6 Page - STMicroelectronics |
6 / 33 page Pin settings L6585DE 6/33 Pin n. Name Function 13 PFG PFC gate driver output. The totem pole output stage is able to drive power MOSFETs with a peak current of 300 mA source and 600 mA sink (typ. values). 14 HBCS 3-level half-bridge current monitor for current control. The current flowing through the HB MOSFET is sensed through a resistor. The resulting voltage is applied to this pin. First level threshold (1.05 V, active during run mode): in case of threshold crossing the IC reacts with frequency increase in order to limit the half-bridge (and lamp) current. Second level threshold (1.6 V, active during ignition and run mode): - Ignition: in case of threshold crossing during the frequency shift, the IC reacts with frequency increase in order to limit the lamp voltage and preventing operation below resonance. - Run mode: in case of threshold crossing because of current spikes (due, for example, to capacitive mode / cross-conduction) longer than 200 ns the L6585DE is latched in low consumption mode to avoid damage to the MOSFETs. Third level threshold (2.75 V, active during ignition and run mode): - Ignition: in case of threshold crossing during frequency shift (e.g. caused by choke saturation), the IC latches to avoid damage to the MOSFETs. - Run mode: in case of threshold crossing by a hard switching event (spike duration equal to around 40 ns) an internal counter is increased. After around 350 (typ.) subsequent hard switching events the IC is latched in low consumption mode. 15 GND Ground. 16 LSD Low side driver output: the output stage can deliver 290 mA source and 480 mA sink (typ. values). 17 VCC Supply voltage of both the signal part of the IC and the gate driver. Clamped with a Zener inside. 18 OUT High-side driver floating reference. This pin must be connected close to the source of the high side power MOSFET. 19 HSD High-side driver output: the output stage can deliver 290 mA source and 480 mA sink (typ. values). 20 BOOT Bootstrapped supply voltage. Bootstrap capacitor must be connected between this pin and OUT pin. Patented, integrated circuitry replaces the external bootstrap diode by means of a high voltage DMOS, synchronously driven with the low side power MOSFET. Table 1. Pin functions (continued) |
Podobny numer części - L6585DE |
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Podobny opis - L6585DE |
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