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SD45215 데이터시트 PDF




SILAN에서 제조한 전자 부품 SD45215은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


 

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부품번호 SD45215 기능
기능 HIGH EFFICIENCY STEP-DOWN DC/DC CONVERTER
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SD45215 데이터시트, 핀배열, 회로
SD45215_Datasheet
HIGH EFFICIENCY STEP-DOWN DC/DC CONVERTER WITH
ADJUSTABLE CURRENT LIMIT FOR AUTOMOTIVE APPLICATIONS
DESCRIPTION
The SD45215 is a high efficiency step down DC-DC converter with
adjustable current limit in compact SOP-8 package, including an
error amplifier, ramp generator, current comparator, slope
compensation, current sense and logic driver. It also integrates a
current error amplifier to have a constant voltage and constant
current control.
Peak current mode PWM control with external adjustable
compensation provides a stable and high efficient operation over a
SOP-8-225-1.27
wide range of load currents. By means of an on board current sense
resistor and the availability of the current sense pins, a current limit
programming is very simple and accurate.
The internal robust PMOS transistor with a typical of 150 m
assures high efficiency even at high output current level. The internal
limiting current of typical value of 3 A, output short and over APPLICATIONS
temperature protection, protect the device from accidental damage.
The internal fixed switching frequency of 120 kHz, and the SOP-8 * Automotive applications
package pin allow building an ultra compact DC/ DC converter with a * Chargers for NiCd, NiMH batteries
minimum board space.
* Simple step-down converters with
FEATURES
adjustable current limit
* Adjustable current generator
* Up to 1.5A output current
* Up to 90% Efficiency
* Input Voltage Range: 8V to 30V
* 120 kHz Internal Jitter Frequency for lower EMI
* Patent -Pending Short Circuit Protection
* Patent -Pending Output Voltage Compensation
* Adjustable current limit
* Over Temperature Protection
* Small SOP-8 Package
ORDERING INFORMATION
Part No.
SD45215SA
SD45215SATR
Package
SOP-8-225-1.27
SOP-8-225-1.27
Marking
45215SA
45215SA
Material
Pb free
Pb free
Packing
Tube
Tape&Reel
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http://www.silan.com.cn
REV:1.3
2011.04.21
Page 1 of 8
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SD45215 pdf, 반도체, 판매, 대치품
SD45215_Datasheet
PIN DESCRIPTION
Pin No.
1
2
3
4
5
6
7
8
Pin Name
I/O
Pin Description
VIN P Input Voltage.
COMP
I/O Frequency compensation, resistor and capacitor connected.
GND
G Ground.
FB I Feedback Input Pin.
CS- I
Current sense Pins, current limit resistor connected.
CS+ I
CHRG
O Charge indication Open Drain Pin.
SW O Switch Pin.
FUNCTION DESCRIPTION
The SD45215 is a complete and simple step down DC-DC converter with adjustable current Limit. By means of an
on board current sense resistor and the availability of the current sense pins, a current limit programming is very
simple and accurate.
Moreover constant current control can be used to charge NiMH and NiCd batteries. The device can be used as a
standard DC-DC converter with adjustable current limit (set by using the external sense resistor).
The internal robust PMOS transistor with a typical of 150 massures high efficiency and a minimum dropout even
at high output current level. The internal limiting current of typical value of 3 A protects the device from accidental
overload avoiding dangerous loads damage.
When overload or output short, the main switch is turned off, thus the current offered to the load is limited,
protecting the load and the device also.
When normal working, the constant current open drain transistor of CHRG is enabled, thus indication is realized
by external LED, the constant current typical value is 1.5mA.
If the temperature of the chip goes higher than a fixed internal threshold (150 °C with 20 °C hysteresis), the device
is turned off.
The internal fixed switching frequency of 120KHz, and the small SOP-8 package allow building an ultra compact
DC-DC converter with a minimum board space.
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http://www.silan.com.cn
REV:1.3
2011.04.21
Page 4 of 8
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SD45215 전자부품, 판매, 대치품
SD45215_Datasheet
MOS DEVICES OPERATE NOTES:
Electrostatic charges may exist in many things. Please take following preventive measures to prevent effectively
the MOS electric circuit as a result of the damage which is caused by discharge:
z The operator must put on wrist strap which should be earthed to against electrostatic.
z Equipment cases should be earthed.
z All tools used during assembly, including soldering tools and solder baths, must be earthed.
z MOS devices should be packed in antistatic/conductive containers for transportation.
Disclaimer :
Silan reserves the right to make changes to the information herein for the improvement of the design and
performance without further notice! Customers should obtain the latest relevant information before placing orders
and should verify that such information is complete and current.
All semiconductor products malfunction or fail with some probability under special conditions. When using Silan
products in system design or complete machine manufacturing, it is the responsibility of the buyer to comply with
the safety standards strictly and take essential measures to avoid situations in which a malfunction or failure of
such Silan products could cause loss of body injury or damage to property.
Silan will supply the best possible product for customers!
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http://www.silan.com.cn
REV:1.3
2011.04.21
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