Supertex inc. HV9150DB1. Hysteretic DC/DC Controller Demoboard. General Description. Specifications. Board Layout. Supertex inc.

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1 HV90DB Hysteretic DC/DC Controller Demoboard General Description The Supertex HV90DB demoboard is for the evaluation of the HV90 hysteretic DC/DC controller. This demoboard consists of all necessary components to create a V to 00V step up converter capable of providing 600mW of output power. This DC/DC converter has a single voltage input and a single voltage output. The demoboard is configured to use the internal voltage reference. In addition, the user also has access to an external voltage reference pin if it is preferred. The output voltage can be adjusted from 0V to 00V by adjusting the potentiometer next to the output terminals. The potentiometer is used in the resistor feedback network for demonstration purposes. The demoboard shows that all necessary components for this 600mW converter can be packed into a square inch, single sided, PCB area. To ensure a stable operation of the DC/DC converter, it is recommended that a low ESR bulk decoupling capacitor be connect at the input voltage supply. Specifications Parameter Value V IN input voltage.7v to.v V OUT output voltage I OUT output current Operating frequency 0V to 00V ma max at 00V 00kHz typical Board Layout 6mm mm Actual Dimensions: 6mm x mm

2 HV90DB Circuit Schematic U U U I F6 F F F VLL VLL VLL C VLL µf VLL XFF ICVG HDaTVP HD VDD VIN L µh C VLL µf C IN µf XEPVTN HTGSaCFL GZVaTGH EV ERCF EER/ EER/ EER- EER- NFQ"Oqfg"Gpcdng VDD R 0 k F 0X 0X"\gpgt"Fkqfg R k R 6 00k R 8 00k R 9 R 7 00k GP ERaGP XEPVN R FREQ 7k C CP 0.µF C CP 0.µF CPAD 6 W XNN IPF JX;7 GP ERaGP VR7 R REF 0 C CT µf T TGH "ejcpig"vq"fgeqwrnkpi"ecrcekvqt kh"gzvgtpcn"tghgtgpeg"ku"crrnkgf0 VR6 0 9 VIN VR R.6k R _TRIM 00k F X X"\gpgt"Fkqfg Rtqvgevkqp C FB 0V VLL ER"?"QHH ER"?"QP F DCX;;U O DU\6FP7PUI EEY EY R 6 VIN VDD R 0 T "?"Lworgt T 6 "?"PC T "?"PC T 6 "?"Lworgt VR JkXQWV C HV.0µF 00V VR R 7.M Hi-V 06

3 LDO (Linear Regulator) and CP (Charge Pump) Mode Option The HV90 can operate in either LDO or CP modes. The CP mode is preferred if the voltage of the input supply is lower than V. The internal charge pump converter can generate a higher voltage supply to drive the gate driver. If a higher supply voltage is available, the LDO mode should be chosen. The following table shows the options to select between LDO and CP modes. The R 0 and D form an independent.v output startup circuit to set the device to LDO mode operation. These components are not required on the demoboard if the CP mode operation is preferred. Part Reference LDO Mode CP Mode R 0Ω Not installed R Not installed 0Ω R 0 kω Not installed D.V Zener Not installed R 7 Not installed 00kΩ Internal and External Voltage Reference Option The HV90 can be configured to use either an internal or external voltage reference. The demoboard is set to use the internal voltage reference. In order to use external voltage reference, the user can replace the R REF 0Ω jumper with a 0.µF decoupling capacitor and connect the external reference to the TP terminal. Please be aware that the EN pin is required to toggle once to activate the device to enable the external voltage reference option. Modification to 00V Output Operation The demoboard can be reconfigured to generate a 00V output voltage. The user can replace the MOSFET driver with one rated at 00V and adjust the value of potentiometer to obtain a 00V output voltage. Since the ON-resistance is different, the maximum output current may change. The user can adjust the switching frequency or duty cycle to compensate for the lower ON-resistance. Please see the table below. Part Reference M 0V Output BSZDNNSG 0V, mω, A 00V Output AON760 00V, 80mΩ, A HV90DB - Typical Performance 90 JX;7"J{uvgtgvke"Eqpxgtvgt"Ghhkekgpe{ = 00V and I O = ma, L = µh, Duty = 7%, C) Ejctig"Rwor"Oqfg *HICVG"?"7:mJ + NFQ"Oqfg *H ICVG "?"mj Kprwv"Xqnvcig"*X+

4 HV90DB - Typical Performance 86 JX;7"J{uvgtgvke"Eqpxgtvgt"Ghhkekgpe{ = 00V F GATE = 00kHz, L = µh, Duty = 0%, LDO Mode, C) 8 "?"0X "?";0X "?"80X "?"X "?"6097X Qwvrwv"Ewttgpv"*oC+ 78 JX;7"J{uvgtgvke"Eqpxgtvgt"Ghhkekgpe{ = 00V F GATE = 8kHz, L = µh, Duty = 7%, CP Mode, C) "?"607X 76 7 "?"08X "?"0X "?"0X "?"09X Qwvrwv"Ewttgpv"*oC+

5 Bill of Materials Reference Description Voltage Package Manufacturer C VDD, C CP, C CP 0.µF, V ceramic capacitor 080 Any C CT µf,, ceramic capacitor 080 Any C FB Not installed 0V 080 Any C HV.0µF, 00V, ceramic capacitor 00V 0 Any C IN µf,, ceramic capacitor 06 Any C VLL µf,, ceramic capacitor 080 Any D BAV99S diodes 00V - SOT-6 Any D DZ00L.V Zener diode - SSSMini Any D DZS000L.V Zener diode - SSSMini Any L µh - - Any M BSZDNNSG 0V MOSFET - 8-Lead (x) DFN Infineon R FREQ kω Any R, R REF 0Ω jumper Any R.6kΩ Any R _TRIM 00kΩ trimmer potentiometer - 86F Any R 7.MΩ high voltage chip resistor 00V 06 Any R, R 9 Not installed Any R kω Any R 6, R 7, R 8 00kΩ Any R 0 kω Any TP, TP, TP, TP, TP Power supply input/output terminals - - Any U HV90K6-G - 6-Lead (x) QFN Supertex does not recommend the use of its products in life support applications, and will not knowingly sell them for use in such applications unless it receives an adequate product liability indemnification insurance agreement. does not assume responsibility for use of devices described, and limits its liability to the replacement of the devices determined defective due to workmanship. No responsibility is assumed for possible omissions and inaccuracies. Circuitry and specifications are subject to change without notice. For the latest product specifications refer to the (website: http//) 0 All rights reserved. Unauthorized use or reproduction is prohibited. Bordeaux Drive, Sunnyvale, CA 9089 Tel: