View BD9009HFP_4746739.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

1/4
STRUCTURE TYPE PRODUCT SERIES FEATURES
Silicon Monolithic Integrated Circuit Flexible Step-Down Switching Regulator
BD9009HFP
Wide input Range 735V Integrated 4A P-ch Power MOS FET High Precision(Reference Voltage) 2% Adjustable Frequency 50k500kHz ((it is possible external synchronization until 500kHz)) Oscillation frequency accuracy 5% (200500kHz)
ABSOLUTE MAXIMUM RATINGSTa25 Parameter Symbol Supply Voltage VIN SW Pin Voltage Vsw Output SW Current Isw EN, SYNC Pin Voltage VEN/SYNC RT, FB, INV Pin Voltage VRT,VFB, VINV Power Dissipation Pd Operating Temperature Range Topr Storage Temperature Range Tstg Maximum Junction Temperature Tjmax
Limits 36 VIN 4(1) VIN 7 5.5(2) -40+105 -55+150 150
Unit V V A V V W
1Do not however exceed Pd. 2Pd derated at 44mW/ for temperature above Ta=25, Mounted on a double layer PCB 70mmx70mmx1.6mm. (with Thermal vias / Copper area70mmx70mm)
OPERATING CONDITIONSTa=-40+105 Parameter Symbol Recommend Supply Voltage VIN Output Switch Current ISW Oscillator Frequency FOSC
Min. 7 50
Max. 35 4 500
Unit V A kHz
Electrical characteristics are not guaranteed (especially when operating on reduce voltage) The product is not designed for protection against radioactive rays.
REV. A
2/4
ELECTRICAL CHARACTERISTICS Unless otherwise specified, Ta=25,VIN=13.2V,VEN=5V
Parameter Entire Device Stand-by Current Quiescent Current Switch Leakage Current Error Amplifier Reference Voltage1 Reference Voltage2 Input Bias Current Oscillator Section Switching Frequency1 Switching Frequency2 Synchronized Frequency Synchronous Frequency Enable Output ON Voltage Output OFF Voltage Sense Current Symbol ISTB IQ IoLEAK VREF1 VREF2 IB FOSC1 FOSC2 FSYNC VENON VENOFF IEN Min. 0.784 0.780 -1 285 283.5 495 2.6 Limits Typ. 0 4.2 0 0.800 0.800 300 300 500 35 Max. 10 6.5 30 0.816 0.820 315 316.5 505 0.8 90 Unit A mA A V V A kHz kHz kHz V V A Condition VEN=0V IO=0A,RT=51k,INV=0.7V VIN=35V,VEN=0V VFB=VINV VIN=1016V,VFB=VINV VINV=0.6V VIN=7V,RT=51k VIN=716V,RT=51k RT=51k,EN/SYNC=500kHz Duty=50%
VEN=5V
PHYSICAL DIMENTIONSMARKING
BD9009HFP
Product Series
Lot No.
HRP7 (unit : mm)
REV. A
3/4
BLOCK DIAGRAM
VIN
EN/SYNC
Vref Internal Bias SOFT START SYNC
+ ERROR AMP INV PWM COMP + 0.8V Slope Set SDWN
CURRENT LIMIT SDWN Reset DRV
DRIVER
+ +
UVLO/ TSD
SW
OSC
FB
GND

RT
COUNTER TIMER
Refer to the Technical Note about the details of the application.
Pin No.Pin Name Pin No. 1 2 3 4 5 6 7 FIN Pin Name VIN SW FB GND INV RT EN/SYNC FIN
REV. A
4/4
NOTES FOR USE
1. Absolute maximum range Absolute Maximum Ratings are those values beyond which the life of a device may be destroyed we cannot be defined the failure mode, such as short mode or open mode. Therefore physical security countermeasure, like fuse, is to be given when a specific mode to be beyond absolute maximum ratings is considered. 2. Operation supply voltage range The circuit functionality is guaranteed within operation of ambient temperature range, as long as it is within operation supply voltage range. The standard electrical characteristic values are guaranteed at the test circuit voltage of VIN=13.2V. They cannot be guaranteed at other voltages in the operating range of 7V-35V. However, the variation will be small. 3. Grounding It is recommended that every capacitor (bypass and another capacitors) is grounded to PIN4 using single-point connections. 4. Input supply voltage Input supply pattern layout should be as short as possible. 5. VIN Terminal For reduce the influence of switching noise, bypass capacitor is connected between VIN and GND.(over 3F) 6. SOFT START The SOFT START block provides a function to prevent the overshoot of the output voltage Vo through gradually increasing the normal rotation input of the error amplifier when power supply turns ON to gradually increase the switching Duty. The soft start time is set to 5 msec. (Typ.). 7. FB Terminal The FB terminal is for phase margin of the DC/DC system. A capacitor and a resistor or an only capacitor placed between the FB terminal and the INV terminal. The values of the capacitor and the resistor shall be adjusted according to the output current and the output capacitor value. The output may be oscillating if the value of capacitor is not sufficient, also the transient response may become insufficient if the value is too large. Therefore, the value of the capacitor and the resistor shall be adequately set up based on the condition of the temperature, and so on. Since the FB terminal also detects output short condition compulsorily applying an external voltage onto the FB terminal must not be performed because it may activate the timer latch protection circuit. 8. Electromagnetic Fields The IC is susceptible to strong electromagnetic fields and may cause malfunction. Therefore, caution should be used when placing it on the PCB. 9. Application Design When designing the external circuit, included adequate margins, including not only steady state but also transient characteristics. 10. Adjacent Pin short mistake fitting Use caution when orienting and positioning the IC for mounting on printed circuit boards. Improper mounting may result in damage to the IC. When VIN and EN terminal are short and used, please note that the destruction of IC is caused with VIN=7V or more enough, when 7 pin EN terminal and 6 pin RT terminal are short-circuit. 11. Over Output Current Protection SW Output terminal has over current protection circuit of 4A(Minimum load current ability), with prevents IC from being damage by short circuit at over current. When over current protection circuit operates, output is turned off immediately, and then this IC restart to operate after 4096/fosc sec.. However, It is recommend not to use that continuously operates the protection circuit (For instance, always the load that greatly exceeds the output current ability is connected or the output is short-circuited, etc.) in these protection circuits by an effective one to the destruction prevention due to broken accident. 12. Over Output Current Protection at start up This IC is designed that over current protection circuit operates at start up and normal operation. Therefore at start up when this IC's total load current (sum of load current and charge current to output capacitor) is exceeded 4A(Minimum load current ability), over current protection circuit operates, and this IC's start up times are excessive time by latch off counter timer(4096/fosc[s]). If this case is occurred, output capacitor is recommended to change small value. 13. Temperature protection (thermal down) circuit This IC has a built-in temperature protection circuit to prevent the thermal destruction of the IC. As described above, be sure to use this IC within the power dissipation range. Should a condition exceeding the power dissipation range continue, the chip temperature Tj will rise to activate the temperature protection circuit, thus turning OFF the output power element. Then, when the tip temperature Tj falls, the circuit will be automatically reset. Furthermore, if the temperature protection circuit is activated under the condition exceeding the Maximum Junction Temperature, do not attempt to use the temperature protection circuit for set design. 14. Output terminal of application circuit short to GND mode When this IC starts up with output-GND short, SW output current is exceeded 4A, and this IC may be destroyed. When VIN input voltage is under 7V with output-GND short, over current protection may don't operates. Please don't use this IC in these cases.
REV. A
Notice
Notes
No copying or reproduction of this document, in part or in whole, is permitted without the consent of ROHM Co.,Ltd. The content specified herein is subject to change for improvement without notice. The content specified herein is for the purpose of introducing ROHM's products (hereinafter "Products"). If you wish to use any such Product, please be sure to refer to the specifications, which can be obtained from ROHM upon request. Examples of application circuits, circuit constants and any other information contained herein illustrate the standard usage and operations of the Products. The peripheral conditions must be taken into account when designing circuits for mass production. Great care was taken in ensuring the accuracy of the information specified in this document. However, should you incur any damage arising from any inaccuracy or misprint of such information, ROHM shall bear no responsibility for such damage. The technical information specified herein is intended only to show the typical functions of and examples of application circuits for the Products. ROHM does not grant you, explicitly or implicitly, any license to use or exercise intellectual property or other rights held by ROHM and other parties. ROHM shall bear no responsibility whatsoever for any dispute arising from the use of such technical information. The Products specified in this document are intended to be used with general-use electronic equipment or devices (such as audio visual equipment, office-automation equipment, communication devices, electronic appliances and amusement devices). The Products specified in this document are not designed to be radiation tolerant. While ROHM always makes efforts to enhance the quality and reliability of its Products, a Product may fail or malfunction for a variety of reasons. Please be sure to implement in your equipment using the Products safety measures to guard against the possibility of physical injury, fire or any other damage caused in the event of the failure of any Product, such as derating, redundancy, fire control and fail-safe designs. ROHM shall bear no responsibility whatsoever for your use of any Product outside of the prescribed scope or not in accordance with the instruction manual. The Products are not designed or manufactured to be used with any equipment, device or system which requires an extremely high level of reliability the failure or malfunction of which may result in a direct threat to human life or create a risk of human injury (such as a medical instrument, transportation equipment, aerospace machinery, nuclear-reactor controller, fuel-controller or other safety device). ROHM shall bear no responsibility in any way for use of any of the Products for the above special purposes. If a Product is intended to be used for any such special purpose, please contact a ROHM sales representative before purchasing. If you intend to export or ship overseas any Product or technology specified herein that may be controlled under the Foreign Exchange and the Foreign Trade Law, you will be required to obtain a license or permit under the Law.
Thank you for your accessing to ROHM product informations. More detail product informations and catalogs are available, please contact us.
ROHM Customer Support System
http://www.rohm.com/contact/
www.rohm.com (c) 2009 ROHM Co., Ltd. All rights reserved.
R0039A

▲Up To Search▲

Price & Availability of BD9009HFP

	To Download BD9009HFP Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .