BD6551G_11

1/4 STRUCTURE PRODUCT Silicon Monolithic Integrated Circuit CONSTANT VOLTAGE AND CONSTANT CURRENT CONTROLLER FOR BATTERY CHARGERS AND ADAPTORS TYPE ＢＤ６５５１Ｇ FEATURE ・ ・ ・ ・ Constant voltage and constant current control Power supply voltage: 1.8V～12V High accuracy reference voltage: 1.21V±1% An accuracy for current-detecting voltage: 200mV±2% ○ ABSOLUTE MAXIMUM RATINGS PARAMETER Power Supply Voltage ICT Pin Maximum Voltage Power Dissipation (Ta=25℃) Symbol VMAX VICTMAX Pd Topr Tjmax Tstg Limit -0.3 ～ 14 -0.3 ～ VCC 675 *1 0 ～ +85 150 -55 ～ +150 Unit V V mW ℃ ℃ ℃ Operating Temperature Range Maximum Junction Temperature Storage Temperature Range *1 Pd derated at 5.4mW/℃ for temperature above Ta=25℃, mounted on 70mm×70mm×1.6mm glass-epoxy PCB. ○ OPERATING CONDITIONS (Ta=0～+85℃) PARAMETER Symbol Power Supply Voltage VCC Limit 1.8～12 *2 Unit V *2 Except an amplifier for voltage control loop guaranteed above VCC=2.5V. REV. A 2/4 ○ ELECTRICAL CHARACTERISTICS PARAMETER 【Total Current Consumption】 Total Supply Current - not taking the output sinking current into account 【Voltage Control Loop】 Transconduction Gain(VCT). Sink Current Only Voltage Control Loop Reference at 1.5mA sinking current 【Current Control Loop】 Transconduction Gain(ICT). Sink Current Only Current Control Loop Reference at 2.5mA sinking current Current out of pin ICT at -200mV 【Output Stage】 Output Short Circuit Current, Output to VCC, Sink Current Only 【UVLO】 UVLO Threshold Voltage UVLO Hysteresis Width Output Short Circuit Current at Full Drive (Ta=25℃ and Vcc=+5V (unless otherwise specified)) Symbol MIN. - Limit TYP. 0.6 MAX. 2 UNIT Conditions ICC mA Ta=25℃ GMV VREF 1.0 1.198 1.186 1.5 196 192 13 4.5 1.21 1.21 3.5 200 200 23 1.222 1.234 204 208 33 mA/mV V Ta=25℃ Ta=25℃ 0 < Ta < 85℃ Ta=25℃ Ta=25℃ 0 < Ta < 85℃ Ta=25℃ Ta=25℃,OUT=VCC, VSE=0V, ICT=-0.3V GMI VSE Ibi mA/mV ｍV μA IOS - 25 50 mA VVT DVVT IOS2 1.8 40 5.0 1.9 100 - 2.0 160 - V mV mA VCC=L→H Ta=25℃ VCC=OUT=1.8V ● This product is not designed for protection against radio active rays. ○ PACKEGE, MARKING SPECIFICATION SSOP6 (UNIT:mm) REV. A 3/4 ○ BLOCK DIAGRAM VCC 6 1.21V VOLTAGE REFERENCE VCC + - 3 OUT 1 VCT + UVLO + 2 GND 4 ICT 5 VSE ○ PIN No. & PIN NAME PIN No. PIN Name 1 2 3 4 5 6 VCT GND OUT ICT VSE VCC Function Input Pin of the Voltage Control Loop Ground Line. 0V Reference For All Voltages Output Pin. Sinking Current Only Input Pin of the Current Control Loop(+) Input Pin of the Current Control Loop(-) Positive Power Supply Line. This pin doubles low voltage input detection pin. REV. A 4/4 ○ Operation Notes 1) Absolute maximum ratings An excess in the absolute maximum rating, such as supply voltage, temperature range of operating conditions, etc., can break down the devices, thus making impossible to identify breaking mode, such as a short circuit or an open circuit. If any over rated values will expect to exceed the absolute maximum ratings, consider adding circuit protection devices, such as fuses. 2) GND voltage The potential of GND pin must be minimum potential in all condition. As an exception, the circuit design allows voltages up to -0.3 V to be applied to the ICT pin. 3) Thermal design Use a thermal design that allows for a sufficient margin in light of the power dissipation (Pd) in actual operating conditions. 4) Inter-pin shorts and mounting errors Use caution when positioning the IC for mounting on printed circuit boards. The IC may be damaged if there is any connection error or if pins are shorted together. 5) Actions in strong electromagnetic field Use caution when using the IC in the presence of a strong electromagnetic field as doing so may cause the IC to malfunction. 6) Mutual impedance Power supply and ground wiring should reflect consideration of the need to lower mutual impedance and minimize ripple as much as possible (by making wiring as short and thick as possible or rejecting ripple by incorporating inductance and capacitance). 7) Regarding input pin of the IC This monolithic IC contains P+ isolation and P substrate layers between adjacent elements in order to keep them isolated. P-N junctions are formed at the intersection of these P layers with the N layers of other elements, creating a parasitic diode or transistor. For example, as shown in the figures below, the relation between each potential is as follows: When GND > Pin A and GND > Pin B, the P-N junction operates as a parasitic diode. When GND > Pin B, the P-N junction operates as a parasitic transistor. Parasitic diodes can occur inevitable in the structure of the IC. The operation of parasitic diodes can result in mutual interference among circuits, operational faults, or physical damage. Accordingly, methods by which parasitic diodes operate, such as applying a voltage that is lower than the GND (P substrate) voltage to an input pin, should not be used. Although the circuit design allows voltages up to -0.3 V to be applied to the ICT pin, voltages lower than this may cause the behavior described above. Use caution when designing the circuit. Resistor (Pin A) ～ ～ P N P substrate GND ～ ～ P+ N N P+ N P substrate Parasitic elements (Pin B) Parasitic elements GND B C E Other Adjacent Elements GND Parasitic elements ～ ～ GND (Pin B) Transistor (NPN) B C ～ ～ N P+ N P P+ N E GND Parasitic elements (Pin A) Simplified structure of a Monolithic IC 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, fuelcontroller 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 © 2011 ROHM Co., Ltd. All rights reserved. R1120A