HV9910B Supertex, HV9910B Datasheet
HV9910B
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HV9910B Summary of contents
Page 1
... LED current. The HV9910B is ideally suited for buck LED drivers. Since the HV9910B operates in open loop current mode control, the controller achieves good output current regulation without the need for any loop compensation. PWM dimming response is limited only by the rate of rise and fall of the inductor current, enabling very fast rise and fall times ...
Page 2
... Line Regulation of V DD, line 1. Also limited by package power dissipation limit, whichever is lower. † V load current external to the HV9910B Denotes the specifi cations which apply over the full operating ambient temperature range of -40°C < Guaranteed by design. Package Options 16-Lead SOIC ...
Page 3
... GATE output fall time FALL 1. Also limited by package power dissipation limit, whichever is lower. † V load current external to the HV9910B Denotes the specifi cations which apply over the full operating ambient temperature range of -40°C < Guaranteed by design. (cont.) (The specifi cations are 25° ...
Page 4
... HV9910B will operate directly off the voltage supplied at the VDD pin. Please note that this external voltage at the VDD pin should not exceed 12V. Although the VIN pin of the HV9910B is rated up to 450V, the actual maximum voltage that can be applied is limited and produces a ramp voltage by the power dissipation in the IC ...
Page 5
... GATE Output The GATE output of the HV9910B is used to drive an ex- ternal FET recommended that the GATE charge of the external FET be less than 25nC for switching frequencies ≤100kHz and less than 15nC for switching frequencies > ...
Page 6
... This pin is the linear dimming input and sets the current sense threshold as LD long as the voltage at the pin is less than 250mV (typ). This pin sets the oscillator frequency. When a resistor is connected be- tween RT and GND, the HV9910B operates in constant frequency mode. RT When the resistor is connected between RT and GATE, the IC operates in constant off-time mode. ...
Page 7
... This dimension is not specifi the original JEDEC drawing. The value listed is for reference only. Drawings are not to scale Top View A Note 1 Seating Plane 0.10 1.25 0.31 4.80 5. 4.90 6.00 0.25 1.65* 0.51 5.00 6.20 7 θ θ L1 View View A 3.80 0.25 0.40 1.27 1.04 3. BSC REF BSC 4.00 0.50 1.27 HV9910B Gauge Plane Seating Plane View B L2 θ θ 0. ...
Page 8
... This dimension is not specifi the original JEDEC drawing. The value listed is for reference only. Drawings are not to scale. (The package drawing(s) in this data sheet may not refl ect the most current specifi cations. For the latest package outline information go to http://www.supertex.com/packaging.html.) Doc.# DSFP-HV9910B A031808 D E1 ...