DC445A datasheet, PDF - EEWORLD Datasheet

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DC445A: Descriptionboard eval for lt1944-1ems; CategoryDevelopment board/suite/development tools; File Size432KB，2 Pages; ManufacturerLinear ( ADI ); Websitehttp://www.analog.com/cn/index.html; Environmental Compliance

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board eval for lt1944-1ems

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QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 445

TRIPLE OUTPUT POWER SUPPLY FOR LCD PANELS

LT1944-1

DESCRIPTION

Demonstration circuit 445 is a highly integrated three-

output converter designed as a low-cost, small size so-

lution to provide bias voltages in small portable TFT-LCD

panels. It is capable of providing 5V/30mA, 15V/2.5mA,

and –10V/1mA using the LT1944-1 dual step-up con-

verter from an input as low as 2.7V. 5V and 15V outputs

are adjustable with a change in the feedback resistors.

The third output is a negative level shifted voltage off the

main regulators.

Design files for this circuit board are available. Call

the LTC factory.

QUICK START PROCEDURE

Refer to Figure 1 for proper measurement equipment

setup and follow the procedure below:

NOTE:

When measuring the output ripple, see Figure 2

NOTE:

The 6V maximum is set by the voltage rating of

the input capacitor, the absolute maximum rating for

Vin and shutdown pins of LT1944-1 is 15V.

Attach voltmeters or oscilloscope probes between

for proper scope probe technique.

Apply a voltage source to the input of the circuit be-

tween the Vin and GND terminals. The circuit will start

up at an input voltage higher than 1.2V. Do not apply

more than 6V to the input.

each output and its closest GND terminal to monitor

the outputs. Switch on the desired channel(s) by set-

ting JP1 and JP2 to the run position.

Connect the proper load at each output.

–

LOAD

–

LOAD

–

LOAD

–

Figure 1. Proper Measurement Equipment Setup

Figure 2. Scope Probe Placement for Measuring Output Ripple

VIN

GND

DC445A Related Products

	DC445A	LT1944-1EMS#TR	LT1944-1EMS#PBF	LT1944-1EMS#TRPBF
Description	board eval for lt1944-1ems	IC reg bst adj 0.1A/175ma 10msop	IC REG BST ADJ 60MA/0.13A 10MSOP	IC REG BST ADJ 60MA/0.13A 10MSOP
Brand Name	-	Linear Technology	Linear Technology	Linear Technology
Is it Rohs certified?	-	incompatible	conform to	conform to
Parts packaging code	-	MSOP	MSOP	MSOP
package instruction	-	TSSOP, TSSOP10,.19,20	TSSOP, TSSOP10,.19,20	TSSOP, TSSOP10,.19,20
Contacts	-	10	10	10
Manufacturer packaging code	-	MS	MS	MS
Reach Compliance Code	-	_compli	compliant	compliant
ECCN code	-	EAR99	EAR99	EAR99
Analog Integrated Circuits - Other Types	-	SWITCHING REGULATOR	SWITCHING REGULATOR	SWITCHING REGULATOR
control mode	-	VOLTAGE-MODE	VOLTAGE-MODE	VOLTAGE-MODE
Control Technology	-	CONSTANT OFF TIME	CONSTANT OFF TIME	CONSTANT OFF TIME
Maximum input voltage	-	12 V	12 V	12 V
Minimum input voltage	-	1.2 V	1.2 V	1.2 V
Nominal input voltage	-	1.2 V	1.2 V	1.2 V
JESD-30 code	-	S-PDSO-G10	S-PDSO-G10	S-PDSO-G10
JESD-609 code	-	e0	e3	e3
length	-	3 mm	3 mm	3 mm
Humidity sensitivity level	-	1	1	1
Number of functions	-	2	2	2
Number of terminals	-	10	10	10
Maximum operating temperature	-	85 °C	85 °C	85 °C
Minimum operating temperature	-	-40 °C	-40 °C	-40 °C
Maximum output current	-	0.225 A	0.225 A	0.225 A
Package body material	-	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY
encapsulated code	-	TSSOP	TSSOP	TSSOP
Encapsulate equivalent code	-	TSSOP10,.19,20	TSSOP10,.19,20	TSSOP10,.19,20
Package shape	-	SQUARE	SQUARE	SQUARE
Package form	-	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)	-	235	260	250
Certification status	-	Not Qualified	Not Qualified	Not Qualified
Maximum seat height	-	1.1 mm	1.1 mm	1.1 mm
surface mount	-	YES	YES	YES
Switch configuration	-	BOOST	BOOST	BOOST
technology	-	BIPOLAR	BIPOLAR	BIPOLAR
Temperature level	-	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL
Terminal surface	-	Tin/Lead (Sn/Pb)	Matte Tin (Sn)	Matte Tin (Sn)
Terminal form	-	GULL WING	GULL WING	GULL WING
Terminal pitch	-	0.5 mm	0.5 mm	0.5 mm
Terminal location	-	DUAL	DUAL	DUAL
Maximum time at peak reflow temperature	-	20	30	NOT SPECIFIED
width	-	3 mm	3 mm	3 mm
Base Number Matches	-	1	1	1

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