Microchip SR086 Bruksanvisning
Microchip
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SR086
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2017 Microchip Technology Inc. DS20005544A-page 1
SR086/SR087
Features
• Efficient Operation without Magnetics
• No High-voltage Capacitors
• Adjustable Main Output Voltage (9V to 50V)
• Additional Internal Linear Regulator:
- 3.3V for SR086
- 5V for SR087
• Up to 100 mA Combined Output Current
• Single BOM for 120 VAC/230 VAC
• Built-in Soft Start
• Less than 200 mW Standby Power
Applications
• White Goods
• Household Appliances
• Lighting Controls
• Circuit Breakers
• Keep-alive Supplies
General Description
The SR086/SR087 are inductorless switching
regulators designed to operate directly from a rectified
AC line. The operating principle is to turn on a pass
transistor when the rectified AC is below the output
voltage and to turn it off when the output voltage
reaches a specific level. The ICs feature an adjustable
main output voltage of 9V to 50V and an additional
fixed output of 3.3V for SR086 and 5V for SR087.
Efficiencies of around 55% may be realized for loads
up to 1W in 120 VAC applications and about 50%
efficiencies for loads up to 800 mW in 230 VAC
applications.
A logic-level enable input allows the SR086/SR087 to
be disabled—useful when they are employed as
keep-alive power supplies.
Package Type
Backside on the SOIC package is at ground potential and may be connected to
ground or left unconnected. See Table 2-1 for pin information.
8-lead SOIC
(with Heat Slug)
(Top view)
1
2
3
4
8
7
6
5
VIN
EN
GND
VREG
GATE
VGD
VOUT
VFB
Heat Slug
WARNING
Galvanic isolation is not provided. Dangerous voltages are present when connected to the AC line. It is
the responsibility of the designer using the SR086/SR087 to ensure that adequate security measures are
in place to protect the end user from electrical shock.
The circuits shown in this data sheet are not guaranteed to meet surge and conducted EMI
requirements. The effectiveness of these circuits may vary with a particular application. The designer
must conduct tests to ascertain compliance with applicable standards and regulations.
Adjustable Offline Inductorless Switching Regulators
Produktspecifikationer
| Varumärke: | Microchip |
| Kategori: | Inte kategoriserad |
| Modell: | SR086 |
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