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HPM10 Datasheet(PDF) 8 Page - ON Semiconductor |
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HPM10 Datasheet(HTML) 8 Page - ON Semiconductor |
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8 / 17 page  HPM10 www.onsemi.com 8 HPM10 Usage in a Hearing Aid HPM10 has the built−in flexibility to allow integration within various sorts of hearing instruments. The battery door can be sealed or unsealed. The hearing aid may have a pushbutton or may not. HPM10 can be integrated with the hearing aid DSP though dedicated communication lines, or it can work independently from the hearing aid DSP. The following list gives a few possible scenarios of integration: Hearing Aid with a Push Button and Sealed Battery Door: Cradle Charging • When the hearing aid is inserted to the cradle, it will charge. While charging, the hearing aid will turn off. • When the hearing aid is taken out from the cradle, it will go into Deep Sleep Mode (HPM10 in Deep Sleep Mode). Power On/Off • To turn on the hearing aid, use the pushbutton. ♦ Logic high at SWIN signal is detected and turns on HPM10 ♦ HPM10 supplies the main DSP with VHA • To turn off the hearing aid, use the pushbutton. ♦ Logic high at SWOUT sent to main DSP ♦ Main DSP to send DS_EN to HPM10 to turn VHA off Store Shelf Mode • To put the hearing aid in Store Shelf Mode, the same operation as turning the hearing aid off applies. Battery • When battery goes EOL: the hearing aid will automatically turn off (HPM10 in Deep Sleep Mode) through two possible mechanisms: ♦ HPM10 goes into Deep Sleep Mode to protect the battery from over discharge ♦ DSP detects low battery voltage and puts HPM10 into Deep Sleep Mode through the DS_EN pin Hearing Aid with a Push Button and Unsealed Battery Door: Cradle Charging • When the hearing aid is inserted to the cradle, it will charge. While charging, the hearing aid will turn off. • When the hearing aid is taken out from the cradle, it will go into Deep Sleep Mode (HPM10 in Deep Sleep Mode). Power On/Off • When the battery is removed, the hearing aid will shut down • When the battery is inserted, the hearing aid will go into Deep Sleep Mode (HPM10 in Deep Sleep Mode). • To turn on the hearing aid, use the pushbutton. ♦ Logic high at SWIN signal is detected and turns on HPM10 ♦ HPM10 supplies the main DSP with VHA • To turn off the hearing aid, use the pushbutton. ♦ Logic high at SWOUT sent to main DSP ♦ Main DSP to send DS_EN to HPM10 to turn VHA off Battery • When battery goes EOL, the hearing aid will automatically turn off (HPM10 in Deep Sleep Mode) through two possible mechanisms: ♦ HPM10 goes into Deep Sleep Mode to protect the battery from over discharge ♦ DSP detects low battery voltage and puts HPM10 in Deep Sleep Mode through the DS_EN pin. Hearing Aid without Push Button and Sealed Battery Door In this mode, it is possible that there won’t be any communication lines between the DSP and HPM10. Cradle Charging and Power On/Off • When the hearing aid is inserted into the cradle, it will charge. While charging, hearing aid will turn off. • When the hearing aid is taken out from the cradle, it will turn on. Store Shelf Mode • To put the hearing aid in Store Shelf Mode ♦ Trigger DS_EN on HPM10 interface either over DSP or by bringing out the DS_EN pin in PCB. This would put HPM10 into deep sleep mode resulting in extended battery shelf life for the hearing aid. Battery • When battery goes EOL, the hearing aid will automatically turn off (HPM10 in Deep Sleep Mode) through two possible mechanisms: ♦ HPM10 goes into Deep Sleep Mode to protect the battery from over discharge ♦ DSP detects low battery voltage and puts HPM10 in Deep Sleep Mode through the DS_EN pin Hearing Aid without a Push button and an Unsealed Battery In this mode, it is possible that there won’t be any communication lines between the DSP and HPM10. |
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Similar Description - HPM10 |
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