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Active: In Production.

Description

Request Full Data Sheet The MAX8685 family charges high-voltage photoflash capacitors quickly, while limiting peak drain from the battery, through an efficient flyback switching regulator. The internal n-channel MOSFET improves efficiency over competing bipolar designs by lowering switch-voltage dropout. An integrated insulated gate bipolar transistor (IGBT) driver enables flash discharge and reduces external component count. The device includes an open-drain active-low DONE output to indicate when the photoflash voltage has reached regulation. The device automatically refreshes the output voltage every 16s, thus efficiently maintains the capacitor charge level with minimum battery drain. The MAX8685A/MAX8685F feature an undervoltage input (UVI) monitor. UVI monitors the supply voltage and suspends switching if the input voltage drops below a programmed threshold. The MAX8685A/MAX8685F also feature a voltage-monitor output that provides a scaled replica of the output voltage. The voltage-monitor output is used for interfacing with a microprocessor's internal A/D converter to assist in implementing red-eye reduction. The MAX8685C/MAX8685D, with fixed peak-primary current limits of 1A and 1.6A, respectively, are offered in a 2mm x 3mm, 8-pin TDFN package. The MAX8685A/MAX8685F, with resistor-programmable current limits of up to 2A (max) and 2.6A (max), respectively, are offered in a 3mm x 3mm, 14-pin TDFN package. All devices operate over the -40°C to +85°C temperature range.

An evaluation kit is available:  MAX8685AEVKIT   MAX8685CEVKIT  

Key Features		Applications/Uses
2s to Charge 100µF to 300V Integrated IGBT Driver Voltage-Monitor Output* Short-/Open-Circuit Protection Controlled Inrush Current Programmable Input Current Limit Up to 2A (MAX8685A) or 2.6A (MAX8685F)* Programmable Input Voltage-Overload Protection* Extended Battery Life with Input-Voltage Monitoring* Internal 2.6A Switch Robust Architecture Allows Use of Low-Cost Transformers High Accuracy Not Dependent on Transformer Turns Ratio Automatic Refresh Mode Draws Minimal Quiescent Current Charge-Done Indicator 3mm x 3mm, 14-Pin TDFN Package (MAX8685A/MAX8685F) 2mm x 3mm, 8-Pin TDFN Package (MAX8685C/MAX8685D) *MAX8685A/MAX8685F only.		Cell-Phone Cameras Digital Cameras Film Cameras Personal Media Players

Evaluation Kits

MAX8685AEVKIT MAX8685CEVKIT

Design Guides

Power Management for Battery-Powered Equipment (PDF)

Reliability Reports

Reliability Report: MAX8685A.pdf Show FIT data for: MAX8685 Request Reliability Report for: MAX8685C MAX8685D MAX8685F MAX8685

Software/Models

none

Ordering Information

Notes: Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day. Part number suffixes: T or T&R = tape and reel;+ = RoHS/lead-free;# = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

Devices: 1-6 of 6

MAX8685A	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX8685AETD+T			Active	TDFN-EP;14 pin;9.6 mm² Outline Drawing: 21-0137 (PDF) Land Pattern: 90-0063 (PDF) Use pkgcode/variation: T1433+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8685C	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX8685CETA+T			Active	TDFN-EP;8 pin;6.3 mm² Outline Drawing: 21-0174 (PDF) Land Pattern: 90-0091 (PDF) Use pkgcode/variation: T823+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8685CETA+			Active	TDFN-EP;8 pin;6.3 mm² Outline Drawing: 21-0174 (PDF) Land Pattern: 90-0091 (PDF) Use pkgcode/variation: T823+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8685D	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX8685DETA+T			Active	TDFN-EP;8 pin;6.3 mm² Outline Drawing: 21-0174 (PDF) Land Pattern: 90-0091 (PDF) Use pkgcode/variation: T823+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8685F	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX8685FEVKIT+			Active	Land Pattern: Not Available		See data sheet
MAX8685FETD+T			Active	TDFN-EP;14 pin;9.6 mm² Outline Drawing: 21-0137 (PDF) Land Pattern: 90-0063 (PDF) Use pkgcode/variation: T1433+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis

More Information

Topmark Coding: MAX8685 New Product Press Release 2008-05-07

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