DC646A datasheet, PDF - EEWORLD Datasheet

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DC646A: Descriptionboard eval for lt3420ems; CategoryDevelopment board/suite/development tools; File Size148KB，3 Pages; ManufacturerLinear ( ADI ); Websitehttp://www.analog.com/cn/index.html; Environmental Compliance

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board eval for lt3420ems

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QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 646

STROBE CAPACITOR CHARGER, HIGH VOLTAGE SUPPLY

LT3420

DESCRIPTION

Demonstration circuit 646 is a DC-DC flyback

converter using the LT 3420EMS to rapidly charge an

output capacitor to 300V for photoflash applications.

It demonstrates a simple application circuit operating

in high efficiency and shows appropriate layout

techniques for the LT3420EMS. The circuit uses

small surface mount components and has very small

board space compared to conventional solutions.

This demonstration circuit is particularly useful for

applications such as digital cameras and high voltage

supplies that require high efficiency and small size.

Design files for this circuit board are available. Call the

LTC factory.

LT is a trademark of Linear Technology Corporation.

QUICK START PROCEDURE

Demonstration circuit 646 is easy to set up to evaluate the

performance of the LT3420EMS. Refer to Figure 1 for proper

measurement equipment setup and follow the procedure

below:

NOTE:

When measuring the input or output voltage ripple,

Set JP1 to DISCONNECT position for separate input

power operation. Connect input power source Vcc to the

Vcc and GND terminals, and limit the input voltage from

2.3V to 6V.

Connect load (a 220uF, 350V photoflash capacitor)

care must be taken to avoid a long ground lead on the

oscilloscope probe. Measure the input or output voltage

ripple by touching the probe tip directly across the V

OUT

and GND terminals. See Figure 2 for proper scope

probe technique.

NOTE:

For safe operation, always shield the circuit

between the +Strobe Cap and –Strobe Cap terminals.

Set JP2 to ON position to enable Charge operation.

Slowly turn on power source Vbatt and Vcc. Check for the

proper output voltages. V

OUT

= 300V.

NOTE:

If there is no output, temporarily disconnect the

when power is on, and always discharge the high

voltage output capacitor after power is off.

Warning: Operate by high voltage trained personnel only

With power off, connect input power source Vbatt to the

load and make sure that JP2 is set to ON position.

For single source operation, set the input source selector

Vbatt and GND terminals. Input voltage is limited to

between 1.8V to 6V.

Jumper JP1 to CONNECT position. Remove the

connection of power source Vcc. Limit the input voltage

from 2.3V to 6V. Vcc will be powered from Vbatt.

To shut down the circuit, connect the JP2 to OFF position.

The output capacitor charging is disabled.

DC646A Related Products

	DC646A	LT3420EDD#PBF	LT3420EMS#PBF	LT3420EDD-1#PBF	LT3420EMS-1#PBF	LT3420EDD#TRPBF	LT3420EDD-1#TRPBF	LT3420EMS#TRPBF	LT3420EMS-1#TRPBF
Description	board eval for lt3420ems	IC PHOTOFLASH CAP CHARGER 10-DFN	IC PHOTOFLASH CAP CHARGER 10MSOP	IC PHOTOFLASH CAP CHARGER 10-DFN	IC PHOTOFLASH CAP CHARGER 10MSOP	IC PHOTOFLASH CAP CHARGER 10-DFN	IC PHOTOFLASH CAP CHARGER 10-DFN	IC PHOTOFLASH CAP CHARGER 10MSOP	IC PHOTOFLASH CAP CHARGER 10MSOP
Brand Name	-	Linear Technology	Linear Technology	Linear Technology	Linear Technology	Linear Technology	Linear Technology	Linear Technology	Linear Technology
Is it Rohs certified?	-	conform to	conform to	conform to	conform to	conform to	conform to	conform to	conform to
Parts packaging code	-	DFN	MSOP	DFN	MSOP	DFN	DFN	MSOP	MSOP
package instruction	-	HVSON, SOLCC10,.12,20	TSSOP, TSSOP10,.19,20	HVSON, SOLCC10,.12,20	TSSOP, TSSOP10,.19,20	HVSON,	HVSON,	TSSOP,	TSSOP,
Contacts	-	10	10	10	10	10	10	10	10
Manufacturer packaging code	-	DD	MS	DD	MS	DD	DD	MS	MS
Reach Compliance Code	-	compliant	compliant	compliant	compliant	compliant	compliant	compliant	compliant
ECCN code	-	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99
Analog Integrated Circuits - Other Types	-	ANALOG CIRCUIT	ANALOG CIRCUIT	ANALOG CIRCUIT	ANALOG CIRCUIT	ANALOG CIRCUIT	ANALOG CIRCUIT	ANALOG CIRCUIT	ANALOG CIRCUIT
JESD-30 code	-	S-PDSO-N10	S-PDSO-G10	S-PDSO-N10	S-PDSO-G10	S-PDSO-N10	S-PDSO-N10	S-PDSO-G10	S-PDSO-G10
JESD-609 code	-	e3	e3	e3	e3	-	e3	e3	e3
length	-	3 mm	3 mm	3 mm	3 mm	3 mm	3 mm	3 mm	3 mm
Humidity sensitivity level	-	1	1	1	1	-	1	1	1
Number of functions	-	1	1	1	1	1	1	1	1
Number of terminals	-	10	10	10	10	10	10	10	10
Maximum operating temperature	-	85 °C	70 °C	85 °C	70 °C	85 °C	85 °C	70 °C	70 °C
Package body material	-	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY
encapsulated code	-	HVSON	TSSOP	HVSON	TSSOP	HVSON	HVSON	TSSOP	TSSOP
Package shape	-	SQUARE	SQUARE	SQUARE	SQUARE	SQUARE	SQUARE	SQUARE	SQUARE
Package form	-	SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE	SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)	-	260	260	260	260	NOT SPECIFIED	260	260	260
Certification status	-	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified
Maximum seat height	-	0.8 mm	1.1 mm	0.8 mm	1.1 mm	0.8 mm	0.8 mm	1.1 mm	1.1 mm
Maximum supply voltage (Vsup)	-	16 V	16 V	16 V	16 V	16 V	16 V	16 V	16 V
Minimum supply voltage (Vsup)	-	2.5 V	2.5 V	2.5 V	2.5 V	2.5 V	2.5 V	2.5 V	2.5 V
Nominal supply voltage (Vsup)	-	3.3 V	3.3 V	3.3 V	3.3 V	3.3 V	3.3 V	3.3 V	3.3 V
surface mount	-	YES	YES	YES	YES	YES	YES	YES	YES
Temperature level	-	INDUSTRIAL	COMMERCIAL	INDUSTRIAL	COMMERCIAL	INDUSTRIAL	INDUSTRIAL	COMMERCIAL	COMMERCIAL
Terminal surface	-	Matte Tin (Sn)	Matte Tin (Sn)	Matte Tin (Sn)	Matte Tin (Sn)	-	Matte Tin (Sn)	Matte Tin (Sn)	Matte Tin (Sn)
Terminal form	-	NO LEAD	GULL WING	NO LEAD	GULL WING	NO LEAD	NO LEAD	GULL WING	GULL WING
Terminal pitch	-	0.5 mm	0.5 mm	0.5 mm	0.5 mm	0.5 mm	0.5 mm	0.5 mm	0.5 mm
Terminal location	-	DUAL	DUAL	DUAL	DUAL	DUAL	DUAL	DUAL	DUAL
Maximum time at peak reflow temperature	-	30	30	30	30	NOT SPECIFIED	30	30	30
width	-	3 mm	3 mm	3 mm	3 mm	3 mm	3 mm	3 mm	3 mm
Base Number Matches	-	1	1	1	-	1	1	1	-

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