HV9912DB1 Supertex, HV9912DB1 Datasheet - Page 4

• Manufacturer Part Number: HV9912DB1
• Description: LED Lighting Development Kits HI BRIGHTNESS BOOST LED DRIVER DEMOBOARD
• Manufacturer: Supertex

Specifications of HV9912DB1

• Lead Free Status / Rohs Status: Supplier Unconfirmed

Fig. 9 shows the recovery of the HV9912DB1 from a short
circuit condition. It can be seen that the LED current recov-
ers normally with no overshoots.
6. PWM Dimming: The rise and fall transitions of the LED
current during PWM dimming are shown in Figs. 10 and 11,
Silk Screen
PWM dimming input
Fig. 10a Rise time of LED Current at 80V output
Fig. 10b Fall time of LED Current at 80V output
Output Voltage
LED Current
(5.0μs/div)
(5.0μs/div)
PWM dimming input
Output Voltage
LED Current
●
1235 Bordeaux Drive, Sunnyvale, CA 94089
4
at output voltages of 80V and 40V respectively. The times-
cale for all waveforms is set at 5.0μs/div. The rise and fall
times are less than 1.0μs in each case. Thus, a PWM dim-
ming ratio of 1:3000 is achievable at a PWM dimming fre-
quency of 200Hz.
PWM dimming input
Fig. 11a Rise time of LED Current at 40V output
Fig. 11b Fall time of LED Current at 40V output
Output Voltage
LED Current
●
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(5.0μs/div)
(5.0μs/div)
●
PWM dimming input
www.supertex.com
Output Voltage
LED Current
HV9912DB1