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| DC/DC converter BP5232A25/BP5232A33 BP5233A33/BP5234A33 Dimensions (Unit : mm) T T H Applications Power supplies for copiers, personal computers, facsimiles, industrial equipment, and AV equipment. 41.0 0.50.1 1.30.2 P=2.540.2 0.250.05 L H 19.5 19.5 23.5 23.5 Marked side The BP5232A25, BP5232A33, BP5233A33, BP5234A33 are DC/DC converters that use PWM system and VFM system. They contain control circuits, switching devices and coils, and operate by only connecting an I/O smoothing capacitor. With a high efficiency of power conversion, the modules are available in stand-alone SIP packages with no heat sink required. Marked side T 12.0 12.0 11.0 12.5 Features 1) High power conversion efficiency. (BP5233A33 : 93%) 2) Large output current. 3) Low current consumption with no load. (BP5233A33 : 200A Typ.) 4) High conversion efficiency. (85% at output current of 100mA) 5) Applicable to various purposes by fine-adjusting output voltage with external circuits. 6) Built-in ON / OFF switch. 7) Heat sink unnecessary. BP5232A25 BP5232A33 BP5233A33 BP5234A33 28.0 28.0 32.5 38.5 Absolute maximum ratings (Ta=25C) Parameter Input voltage Output current Operating temperature Storage temperature Symbol VIN IO Topr Tstg 2 2 -20 to +55 -25 to +80 Limits BP5232A25 BP5232A33 BP5233A33 BP5234A33 7 3 4 Unit V A C C Derating required according to the input voltage and ambient temperature. Recommended operating conditions (Ta=25C) Parameter Input voltage Symbol VIN Min. 4.5 Typ. 5.0 Max. 5.5 Unit V Rev.C 1/7 Block diagram BP5232A25 / BP5232A33 BP5233A33 / BP5234A33 VIN=5V 9 2 VO + 470F VIN=5V 9 2 VO + 470F 1000F 10 3 1000F + + 10 3 11 Control circuit 1 Control circuit 1 7 CTL signal ON / OFF CTL signal ON / OFF 7 6 5 4 6 5 4 Pin descriptions BP5232A25 , 5232A33 Pin No. 1 2 3 4 5 Pin description Feed back BP5233A33 , BP5234A33 Pin No. 6 7 9 10 Pin description GND CTL VIN1 VIN2 Pin No. 1 2 3 4 5 Pin description Feed back Pin No. 6 7 9 10 11 Pin description GND CTL VIN1 VIN2 VIN3 VOUT1 VOUT2 GND GND VOUT1 VOUT2 GND GND Pin 8 is removed. Pin 8 is removed. Electrical characteristics BP5232A25 (Unless otherwise noted, VlN=5V, IO=1A, SW=1, Ta=25C) Parameter Input voltage Output voltage Output current Current consumption at no load Load regulation Output ripple voltage Power conversion efficiency CTL pin ON voltage CTL pin OFF voltage Symbol VIN VO IO IIN VO Min. 4.5 2.4 - - - - 84 1.8 - Typ. 5 2.5 - 200 13 33 89 - - Max. 5.5 2.6 2 300 33 100 - - 0.3 Unit V V A A mV mVPP % V SW=2 SW=2 1 Conditions DC Measurement circuit Fig.1 Fig.1 Fig.1 Fig.1 Fig.1 Fig.1 Fig.1 Fig.1 Fig.1 IO=0A IO=0.1A to 2A 2 VON VOFF V 1 Derating required according to the input voltage and ambient temperature. 2 Pulse noise not included. Rev.C 2/7 BP5232A33 (Unless otherwise noted, Parameter Input voltage Output voltage Output current Current consumption at no load Load regulation Output ripple voltage Power conversion efficiency CTL pin ON voltage CTL pin OFF voltage VIN VO IO IIN VIN=5V, IO=1A, SW=1, Ta=25C) Symbol Min. 4.5 3.17 - - - - 88 1.8 - Typ. 5 3.3 - 200 16 33 93 - - Max. 5.5 3.43 2 300 42 100 - - 0.3 Unit V V A A mV mVPP % V 1 Conditions DC Measurement circuit Fig.1 Fig.1 Fig.1 Fig.1 Fig.1 Fig.1 Fig.1 IO=0A IO=0.1A to 2A VO VON SW=2 SW=2 Fig.1 Fig.1 VOFF V 1 Maximum output current must be reduced by ambient temperature. BP5233A33 (Unless otherwise noted, VIN=5V, IO=1.5A, SW=1, Ta=25C) Parameter Input voltage Output voltage Output current Current consumption at no load Load regulation Output ripple voltage Power conversion efficiency CTL pin ON voltage CTL pin OFF voltage Symbol VIN VO IO IIN VO Min. 4.5 3.17 - - - - 88 1.8 - Typ. 5 3.3 - 200 16 33 93 - - Max. 5.5 3.43 3 300 42 150 - - 0.3 Unit V V A A mV mVPP % V SW=2 SW=2 1, 4 Conditions DC 2 Measurement circuit Fig.2 Fig.2 Fig.2 Fig.2 Fig.2 Fig.2 Fig.2 Fig.2 Fig.2 IO=0A IO=0.1A to 3A 3 VON VOFF V 1 Maximum output current must be reduced by ambient temperature. 2 Give the start time of input as 5ms within. 3 An output ripple voltage sometimes changes in capacitor to use, the measurement environment. 4 There is restriction in use time, in the case that the output current is 2.5A over. Please refer to " the passage output current characteristic" of later description. BP5234A33 (Unless otherwise noted, VIN=5V, IO=2A, SW=1, Ta=25C) Parameter Input voltage Output voltage Output current Current consumption at no load Load regulation Output ripple voltage Power conversion efficiency CTL pin ON voltage CTL pin OFF voltage Symbol VIN VO IO IIN VO Min. 4.5 3.17 - - - - 88 1.8 - Typ. 5 3.3 - 300 16 33 93 - - Max. 5.5 3.43 4 400 42 150 - - 0.3 Unit V V A A mV mVPP % V SW=2 SW=2 1, 3 Conditions DC Measurement circuit Fig.2 Fig.2 Fig.2 Fig.2 Fig.2 Fig.2 Fig.2 Fig.2 Fig.2 IO=0A IO=0.1A to 4A 2 VON VOFF V 1 Maximum output current must be reduced by ambient temperature. 2 Give the start time of input as 5ms within. 3 An output ripple voltage sometimes changes in capacitor to use, the measurement environment. Rev.C 3/7 Measurement circuit BP5232A25 / BP5232A33 10 9 1 2 SW 7 6 5 4 3 2 1 VO A VIN A 1000F / 50V V C2 C1 + + 470F / 50V 0.47F V C3 f f : frequency counter C1, C2 : Low impedance type C3 : film capacitor A large ripple current flows to the input smoothing capacitor due to the output load. Be minded to use within the allowable ripple current of the capacitor. The capacitor with a particularly low impedance is used as the output smoothing capacitor C2 so as to suppress the output ripple voltage. Select the capacitor according to the purpose of use in each case. Fig.1 T Switching frequency=1 / T Output ripple voltage Note that the output ripple voltage depends on the type and characteristics of the output capacitor. BP5233A33 / BP5234A33 11 10 9 1 2 SW 7 6 5 4 3 2 1 VO A VIN A 1000F / 50V V C1 + 470F / 50V C2 + 0.47F V C3 f f : frequency counter C1, C2 : Low impedance type C3 : film capacitor A large ripple current flows to the input smoothing capacitor due to the output load. Be minded to use within the allowable ripple current of the capacitor. The capacitor with a particularly low impedance is used as the output smoothing capacitor C2 so as to suppress the output ripple voltage. Select the capacitor according to the purpose of use in each case. Fig.2 T Switching frequency=1 / T Output ripple voltage Note that the output ripple voltage depends on the type and characteristics of the output capacitor. Rev.C 4/7 Circuit operation (1) The basic application examples are shown in Fig.3. The externally installed parts are only the input and output smoothing capacitors. (2) Switching on and off the output voltage is allowed. The output can be switched off by making pin 7 to be low or open (high impedance). (See Fig.4) (3) Fine adjustment of the output voltage is allowed. The fine adjustment of output voltage can be performed from pin 1 via the resistor by connecting the output terminal (pin2, 3) and GND. (See Fig.5) (4) Be sure to use a fuse for the safety. Basic application BP5232A25 / BP5232A33 VIN FUSE + 1000F + 470F BP5233A33 / BP5234A33 2 1 10 9 7 6 5 4 3 VO VIN FUSE 11 10 9 7 6 5 4 3 2 1 VO + 1000F + 470F Fig.3 Output ON / OFF control BP5232A25 / BP5232A33 VIN FUSE + 1000F BP5233A33 / BP5234A33 2 1 10 9 7 6 5 4 3 VO VIN FUSE 11 10 9 7 6 5 4 3 2 1 VO SW + 470F SW + 1000F + 470F Fig.4 Output voltage fine adjustment BP5232A25 / BP5232A33 VIN FUSE - 1000F BP5233A33 / BP5234A33 2 1 10 9 7 6 5 4 3 VO' R1 VIN FUSE 11 10 9 7 6 5 4 3 2 1 VO' R1 VO R2 SW + 470F SW + 1000F VO R2 VO' value setting equations VO'=VO 1+ R1 R2 R1+R2 50k It is recommended that the output voltage should be adjusted within the range of 10% of the rated output voltage, so that the performance of the module can fully be exhibited. Fig.5 Rev.C 5/7 Operation notes (1) The output current should be reduced according to an increase in the input voltage or ambient temperature. Use the module within the derating curve range. (2) In case that the output is controlled by switching on and off utilizing pin 7 or in case that the input voltage is applied, a large inrush electrical current may flow. Be minded to use within the allowable operating range. This allowable operating range is specified by the safety operating range of the switching transistor in the module. The amount of the inrush current varies depending on the output impedance of the input power supply or the capacity value of the capacitor to be connected to the output. (3) Protection circuit for output current is incorporated. In case that the output is short-circuited, the output will be latched by switching off. The protection circuit can be canceled by making CTL terminal active state (CTL= HIGH), after once making it standby state (CTL=LOW), or by resupplying the power. However, in case that the protection circuit is canceled by resupplying the power source, it may not be canceled even by resupplying the power source in the state that the electrical charge is remained in CIN (the state that voltage is remained in VIN) even after the power source is switched off. (4) The rising time of the input voltage should be made within 5ms. There may be a case that the protection circuit is activated. (5) I / O smoothing capacitors should be connected between I / O and GND terminals. (6) Normally, use by short-circuiting pins 1, 2, 3, pins 4, 5, 6, and pins 9, 10, 11 (BP5232A25) respectively. (7) A large ripple current flows to the input smoothing capacitor due to the output load. Be minded to use within the allowable ripple current of the capacitor. (8) The capacitor with a particularly low impedance is used as the output smoothing capacitor C2 so as to suppress the output ripple voltage. Select the capacitor according to the purpose of use in each case. Electrical characteristics BP5232A25 5 100 CONVERSION EFFICIENCY : (%) 90 80 70 60 50 40 30 20 10 0 VIN=4.0V VIN=5.0V 100 OUTPUT CURRENT : IO (A) 4 PW=100s 3 INPUT CURRENT (A) VIN=6.0V PW=10ms 10 2 1 0 50 AMBIENT TEMPERATURE : Ta (C) 100 0.5 1.0 1.5 2.0 1 0.1 TC=25C Single Pulse 1 VOLTAGE BETWEEN INPUT PIN TO OUTPUT PIN (V) 10 OUTPUT CURRENT : IO (A) Fig.6 Derating curve Fig.7 Conversion efficiency Fig.8 Safe operation range BP5232A33 5 100 CONVERSION EFFICIENCY : (%) 90 80 70 60 50 40 30 20 10 0 0.5 1.0 1.5 2.0 VIN=5.0V VIN=4.0V 100 OUTPUT CURRENT : IO (A) 4 PW=100s 3 INPUT CURRENT (A) VIN=6.0V PW=10ms 10 2 1 0 50 AMBIENT TEMPERATURE : Ta (C) 100 1 0.1 TC=25C Single Pulse 1 VOLTAGE BETWEEN INPUT PIN TO OUTPUT PIN (V) 10 OUTPUT CURRENT : IO (A) Fig.9 Derating curve Fig.10 Conversion efficiency Fig.11 Safe operation range Rev.C 6/7 BP5233A33 3.5 1ms 3 OUTPUT CURRENT : IO (A) 2.5 2 1.5 1 0.5 0 DC 100 CONVERSION EFFICIENCY : (%) 90 80 70 60 50 40 30 20 10 0 0.5 1.0 1.5 2.0 2.5 3.0 VIN=5.0V 100 PW=100s INPUT CURRENT (A) VIN=4.0V VIN=6.0V PW=10ms 10 5 10 15 20 25 30 35 40 45 50 55 60 AMBIENT TEMPERATURE : Ta (C) 1 0.1 TC=25C Single Pulse 1 VOLTAGE BETWEEN INPUT PIN TO OUTPUT PIN (V) 10 OUTPUT CURRENT : IO (A) Fig.12 Derating curve Fig.13 Conversion efficiency Fig.14 Safe operation range BP5234A33 4.5 1ms 4 OUTPUT CURRENT : IO (A) 3.5 3 2.5 2 1.5 1 0.5 0 5 10 15 20 25 30 35 40 45 50 55 60 AMBIENT TEMPERATURE : Ta (C) DC 100 CONVERSION EFFICIENCY : (%) 90 80 70 VIN=6.0V 60 50 40 30 20 10 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 VIN=4.0V 100 PW=100s INPUT CURRENT (A) VIN=5.0V PW=10ms 10 1 0.1 TC=25C Single Pulse 1 VOLTAGE BETWEEN INPUT PIN TO OUTPUT PIN (V) 10 OUTPUT CURRENT : IO (A) Fig.15 Derating cureve Fig.16 Conversion efficiency Fig.17 Safe operation range Rev.C 7/7 Appendix Notes No technical content pages of this document may be reproduced in any form or transmitted by any means without prior permission of ROHM CO.,LTD. The contents described herein are subject to change without notice. The specifications for the product described in this document are for reference only. Upon actual use, therefore, please request that specifications to be separately delivered. Application circuit diagrams and circuit constants contained herein are shown as examples of standard use and operation. Please pay careful attention to the peripheral conditions when designing circuits and deciding upon circuit constants in the set. Any data, including, but not limited to application circuit diagrams information, described herein are intended only as illustrations of such devices and not as the specifications for such devices. ROHM CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any third party's intellectual property rights or other proprietary rights, and further, assumes no liability of whatsoever nature in the event of any such infringement, or arising from or connected with or related to the use of such devices. Upon the sale of any such devices, other than for buyer's right to use such devices itself, resell or otherwise dispose of the same, no express or implied right or license to practice or commercially exploit any intellectual property rights or other proprietary rights owned or controlled by ROHM CO., LTD. is granted to any such buyer. Products listed in this document are no antiradiation design. The products listed in this document are designed to be used with ordinary electronic equipment or devices (such as audio visual equipment, office-automation equipment, communications devices, electrical appliances and electronic toys). Should you intend to use these products with equipment or devices which require an extremely high level of reliability and the malfunction of with would directly endanger human life (such as medical instruments, transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers and other safety devices), please be sure to consult with our sales representative in advance. About Export Control Order in Japan Products described herein are the objects of controlled goods in Annex 1 (Item 16) of Export Trade Control Order in Japan. In case of export from Japan, please confirm if it applies to "objective" criteria or an "informed" (by MITI clause) on the basis of "catch all controls for Non-Proliferation of Weapons of Mass Destruction. Appendix1-Rev1.1 |
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