Microchip HV853 Manual

Microchip Ikke kategoriseret HV853

Læs gratis den danske manual til Microchip HV853 (20 sider) i kategorien Ikke kategoriseret. Denne vejledning er vurderet som hjælpsom af 20 personer og har en gennemsnitlig bedømmelse på 4.9 stjerner ud af 10.5 anmeldelser. Har du et spørgsmål om Microchip HV853, eller vil du spørge andre brugere om produktet?

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Side 1/20
2023 Microchip Technology Inc. and its subsidiaries DS20005710A -page 1
HV853
Features
• No External Components required when using an
External Electroluminescent (EL) Clock
Frequency
• EL Frequency can be set by an External Resistor
• Low Noise
• DC to AC Converter
• Drives up to 5.3 nF (approximately 1.5 in
2
Lamp)
Load
• Output Voltage Regulation
• Enable Function
• EL Lamp Dimming
Applications
• Cellular Phone Keypad
• Watches
• Small Handheld Wireless Devices
• MP3 Players
General Description
The HV853 is a high-voltage low-noise, inductorless EL
lamp driver. It is the low-noise version of the HV852
with improved electromagnetic interference (EMI)
performance, operating over an input voltage range of
3.2V to 5V. It is designed to drive EL lamps of up to
1.5 in
2
, with capacitive values of up to 5.3 nF. The
HV853 converts a low-voltage DC input to a
high-voltage AC output across an EL lamp. A nominal
regulated output voltage of ±80V is applied to the EL
lamp. It uses a charge pump scheme to boost the input
voltage, eliminating the need for an external inductor,
diode, and high-voltage capacitor commonly found in
conventional topologies.
The charge pump circuit discharges its energy into an
EL lamp through a high-voltage H-bridge. Once the
voltage reaches its regulated limit, it is turned off to
conserve power. The EL lamp is then discharged to
ground and the H-bridge changes state to allow the
charge pump to charge the EL lamp in the opposite
direction.
The EL lamp frequency can be set either by an external
resistor R
EL
or by applying an external clock where the
clock frequency is divided by 128 to set the EL lamp
frequency.
Package Types
WDFN pads are at the bottom of the package. Center heat slug is at ground
potential. See Table 2-1 for pin information.
8-lead MSOP
(Top view)
10-lead WDFN
(Top view)
1
2
3
4
8
7
6
5
VA
VB
GND
CLKEN
VDD
REL
EN
CLKIN
VDD
REL
EN
CLKIN
VDD
1
2
3
4
10
9
8
7
VA
VB
GND
GND
CLKEN
56
High-Voltage Low-Noise Inductorless EL Lamp Driver

Produkt Specifikationer

Mærke: Microchip
Kategori: Ikke kategoriseret
Model: HV853

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