Datasheet > MCP1662

MCP1662

更新时间： 2024-11-17 01:12:59

品牌	Logo	应用领域
美国微芯 - MICROCHIP		/
页数	文件大小	规格书
28页	614K
描述
High-Voltage Step-Up LED Driver with UVLO and Open Load Protection

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MCP1662 数据手册

MCP1662

High-Voltage Step-Up LED Driver with UVLO and Open Load Protection

Features

General Description

• 36V, 800 m Integrated Switch

• Up to 92% Efficiency

The MCP1662 device is a compact, space-efficient,

fixed-frequency, non-synchronous step-up converter

optimized to drive LED strings with constant current

from a two- or three-cell alkaline or lithium Energizer®,

or NiMH/NiCd, or one-cell Lithium-Ion or Li-Polymer

batteries.

• Drive LED Strings in Constant Current

• 1.3A Peak Input Current Limit:

- I_LEDup to 200 mA @ 5.0V V_IN, 4 White LEDs

- I_LEDup to 125 mA @ 3.3V V_IN, 4 White LEDs

- I_LEDup to 100 mA @ 4.2V V_IN, 8 White LEDs

• Input Voltage Range: 2.4V to 5.5V

• Feedback Voltage Reference: V_FB= 300 mV

• Undervoltage Lockout (UVLO):

The device integrates a 36V, 800 m low-side switch,

which is protected by the 1.3A cycle-by-cycle inductor

peak current limit operation. All compensation and pro-

tection circuitry is integrated to minimize the number of

external components.

The internal feedback (V_FB) voltage is set to 300 mV for

low power dissipation when sensing and regulating the

LED current. A single resistor sets the LED current.

- UVLO @ V_INRising: 2.3V, typical

- UVLO @ V_INFalling: 1.85V, typical

• Sleep Mode with 20 nA Typical Quiescent Current

• PWM Operation: 500 kHz Switching Frequency

• Cycle-by-Cycle Current Limiting

The device features an Undervoltage Lockout (UVLO)

that avoids start-up with low inputs or discharged bat-

teries for two-cell-powered applications.

• Internal Compensation

There is an open load protection (OLP) which turns off

the operation in situations when the LED string is acci-

dentally disconnected or the feedback pin is short-cir-

cuited to GND.

• Open Load Protection (OLP) in the Event of:

- Feedback pin shorted to GND (prevent

excessive current into LEDs)

- Disconnected LED string (prevent overvoltage

to the converter’s Output and SW pin)

For standby applications (EN = GND), the device stops

switching, enters into Sleep mode and consumes

20 nA typical of input current.

• Overtemperature Protection

• Available Packages:

- 5-Lead SOT-23

Package Types

- 8-Lead 2x3 TDFN

MCP1662

SOT-23

Applications

• Two and Three-Cell Alkaline or NiMH/NiCd White

LED Driver for Backlighting Products

GND

V_FB

V_IN

• Li-Ion Battery LED Lighting Application

• Camera Flash

• LED Flashlights and Backlight Current Source

• Medical Equipment

MCP1662

2x3 TDFN*

• Portable Devices:

V_FB

- Handheld Gaming Devices

- GPS Navigation Systems

- LCD Monitors

P_GND

GND

V_IN

- Portable DVD Players

* Includes Exposed Thermal Pad (EP); see

Table 3-1.

 2014-2015 Microchip Technology Inc.

DS20005316E-page 1

12 3 4 5 6 7...28

中文翻译

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与MCP1662相关器件

型号	品牌	获取价格	描述	数据表
MCP1662T-E/MN	MICROCHIP	获取价格	High-Voltage Step-Up LED Driver with UVLO and Open Load Protection
MCP1662T-E/OT	MICROCHIP	获取价格	High-Voltage Step-Up LED Driver with UVLO and Open Load Protection
MCP1663	MICROCHIP	获取价格	The MCP1663 device is a compact, high-efficiency, fixed-frequency, non-synchronous step-up
MCP1664	MICROCHIP	获取价格	The MCP1664 device is a compact, space-efficient, fixed-frequency, non-synchronous step-up
MCP1665	MICROCHIP	获取价格	The MCP1665 device is a compact, high-efficiency, fixed-frequency, non-synchronous step-up
MCP-16-I9-LL	YAMAICHI	获取价格	MatchCon
MCP-16-TI9-LL	YAMAICHI	获取价格	MatchCon
MCP1700	MICROCHIP	获取价格	Low Quiescent Current LDO
MCP1700_07	MICROCHIP	获取价格	Low Quiescent Current LDO
MCP1700_13	MICROCHIP	获取价格	Low Quiescent Current LDO

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