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问 成本越低越好. 答 1: 用TOP200或TOP210 
供应:开关电源器材 DC/DC模块 充电控制电路 电机控制电路
型号           参数                                库存数量 价格(1000PCS 价)
MC7912CT    -12V三端稳压管 全新                   18000PCS    0.60
BTS432      智能高端电源开关                       1000PCS    3.50
SK3122      2A12V                                  2000PCS    1.50
SK3052      2A5V                                   2000PCS    1.50
PQ30RV2     2ADC/DC                                1000PCS    1.50
AT89C1051   单片机                                 1000PCS    3.50
L292        电机控制电路                            500PCS    5.00
L295        电机控制电路                            500PCS    6.00
L293        电机控制电路                           1000PCS    4.20
L297        步进马达控制器                          500PCS    6.00
L298        电机控制电路                            500PCS    6.00
L6203       电机控制电路                            500PCS    6.00
L6506       步进电动机电流控制器                    800PCS    6.00
SLA4030     4A120V达林顿管                         1000PCS    5.00
SLA4060     5A120V达林顿管                         1000PCS    6.00
SLA7021M    3A100V  VMOS管                         1000PCS    6.00
SLA7024M    1.5A100V  VMOS管                       1000PCS    5.00
SLA7026M     3A100V  VMOS管                        1000PCS    6.00
SLA5201                                            1000PCS    6.00
09384093    场效应功率块(汽车风机控制）             500PCS    8.00
P6KE200A    瞬变电压抑制器 全新                  100000PCS    0.70
UF4005      超快速二极管 全新  75nS              100000PCS    0.18
UF4002      超快速二极管 全新  50nS              100000PCS    0.12
UF5402      超快速二极管 全新  50nS              100000PCS    0.45
UF5408      超快速二极管 全新  75nS              100000PCS    0.65
bq2004PN    镍氢。锂电池充电控制电路               8000PCS    5.00
bq2002PN    镍氢。锂电池充电控制电路                500PCS    4.50
UC3907N     均流电路控制电路                       3000PCS    2.50
UC3854N     功率因数控制电路                       3000PCS    2.50
UC3852      功率因数控制电路                       1000PCS    2.00
UC3846N     PWM控制电路                            3000PCS    1.50
UC3825N     PWM控制电路                            1000PCS    2.50
UC3637      双PWM电路                              2000PCS    6.00
IR2110      PWM控制电路                            1000PCS    3.00
IR2111      PWM控制电路                            1000PCS    1.80       
IR2151      电子镇流器控制电路                    10000PCS    1.50
UC3842      PWM控制电路                            3000PCS    0.45
UC3843      PWM控制电路                            3000PCS    0.45
UC3844      PWM控制电路                            3000PCS    0.45
UC3845      PWM控制电路                            5000PCS    0.45
SG3524      PWM控制电路                            1000PCS    1.50
SG3525      PWM控制电路                            1000PCS    1.80
SG3526      PWM控制电路                             500PCS    2.50
TL494       PWM控制电路                           10000PCS    0.40
UA748       运算放大器 全新                        2000PCS    2.00
UA771       高速运算放大器 全新                    2000PCS    2.00
LM158       运算放大器                             1000PCS    1.00
LM358       运算放大器                             5000PCS    0.35
LM324       运算放大器                             5000PCS    0.40
MC1458      运算放大器 全新                        2000PCS    0.80
LM139DG     运算放大器                              500PCS    1.00
MC34063     DC/DC 1A PWM控制电路                   5000PCS    0.70
LT1074CT7   DC/DC 5A PWM控制电路                    500PCS    5.00
LT1170      单片开关电源 升压型                     500PCS    5.00
LT1270      单片开关电源 降压型                     500PCS    6.00
L200C       DC/DC 3A PWM控制电路                    500PCS    2.50
L296        DC/DC 4A PWM控制电路                    500PCS    6.00
L4960       DC/DC 2.5A PWM控制电路                 1000PCS    2.50
MC34166     DC/DC 3A 升.降压型                     1000PCS    3.00
MC34167     DC/DC 5A 升.降压型                     1000PCS    3.50
2N6028      单结体晶体管 全新                      3000PCS    1.20
BS08A       触发三极管                             3000PCS    0.60
VUC25-12    28A1200V三相桥                         5000PCS   15.00
VMM15-045   20A450V0.20欧 两独立配对VMOS管         4000PCS   12.00
VVZ12-08    12A800V三相半控桥                       500PCS   25.00
硅光电池    (BPW41D)5*5mm受光面(硅光二极管) 全新  10000PCS    0.60
触发二极管  (用于触发可控硅) 全新                100000PCS    0.05
SP1110      1A240V交流固态继电器 全新             30000PCS    3.50
67L70       70度1A温度开关                         1000PCS    1.50
YDS112      DC/DC (15-35V)/12V 1A                  1000PCS    3.00
YDS105      DC/DC (10-35V)5V 1A                    2000PCS    3.50
YDS212      DC/DC (15-35V)/12V 2A                  2000PCS    3.50
YDS205      DC/DC (15-35V) 5V 2A                   1000PCS    4.00
YDS224      DC/DC (26-40V) 24V 2A                   500PCS    4.00
YDSR3V3     DC/DC (10-35V) 3.3V 3A                 2000PCS    4.50
YDS305      DC/DC (15-35V) 5V 3A                   2000PCS    4.50
YDS312      DC/DC (15-35V)/12V 3A                  2000PCS    4.50
KA1M0680    DC/DC PWM控制电路 100W                 2000PCS    4.50
KA1M0880    DC/DC PWM控制电路 150W                 1000PCS    5.00
KA7M0880    DC/DC PWM控制电路 150W                 2000PCS    5.00
KA2S0880    DC/DC PWM控制电路 150W                 1000PCS    5.00
KA1L0880    DC/DC PWM控制电路 150W                 1000PCS    5.00
KA5M0765    DC/DC PWM控制电路 全新                 5000PCS    3.80
KA5Q1265    DC/DC PWM控制电路 全新                 6000PCS    5.00
TOP210      DC/DC PWM控制电路 5W                  10000PCS    1.50
TOP200      DC/DC PWM控制电路 15W                 10000PCS    1.80
TNY254P     DC/DC PWM控制电路 8W                   5000PCS    1.60
TNY264P     DC/DC PWM控制电路 9W                   3000PCS    1.80
TOP232P     DC/DC PWM控制电路 10W                  3000PCS    1.80
TOP222P     DC/DC PWM控制电路 10W                 15000PCS    1.80
TOP223P     DC/DC PWM控制电路 15W                  1000PCS    3.00
TOP204      DC/DC PWM控制电路 50W                  1000PCS    5.00
TOP222Y     DC/DC PWM控制电路 15W                  8000PCS    2.50
VIPER50A    DC/DC PWM控制电路 50W                  1000PCS    3.50
PQ4040      TDK PQ40磁芯                           1000PCS    4.50
PQ3535      TDK                                     500PCS    2.00
EI40        TDK                                    1000PCS    1.50
EI50        TDK                                    1000PCS    1.50
EI60        TDK                                    1000PCS    4.00
EE42        TDK                                    2000PCS    1.50
EC9090      TDK                                     200PCS   70.00
UF10.5      共模电感                              10000PCS    0.50
3A泸波器    插座式泸波器                           5000PCS    3.00
27mm磁环    铁粉芯磁环  黄白导磁率75              10000PCS    0.40
24mm磁环    铁粉芯磁环   黄白导磁率75             10000PCS    0.30
DPS12R09    DC/DC电源12V/9V 1W 全新                4000PCS    8.00
DPS05R09    DC/DC电源5V/9V 1W 全新                 2000PCS    8.00
PKC2131PI   DC/DC 24V/+5V +12V -12V 15W             100PCS   35.00
PKA3314P    DC/DC 24V/+12V 30W                      500PCS   25.00
WR30-48D12  DC/DC 48V/+12V-12V30W                   500PCS   30.00
TDK 2405    DC/DC 24V/5V 250mA                      400PCS   12.00
ZS1R5 2405  DC/DC 24V/5V  1.5W                      600PCS   15.00
ZS1R5 1205  DC/DC 12V/5V  1.5W                      300PCS   15.00
ZS1R5 0512  DC/DC 5V/12V  1.5W                      500PCS   15.00   
ZS1R5 0505  DC/DC 5V/5V  1.5W                       200PCS   15.00
ZS1R5 1212  DC/DC 12V/12V   1.5W                    300PCS   15.00
ZW1R5 0512  DC/DC 5V/+12V -12V  1.5W                200PCS   18.00
ZW1R5 2415  DC/DC 24V/+15V -15V  1.5W               200PCS   18.00
ZW1R5 1215  DC/DC 12V/+15V -15V  1.5W               200PCS   18.00
ZW1R5 0515  DC/DC 5V/+15V -15V  1.5W                200PCS   18.00
ZS3  2405   DC/DC 24V/5V  3W                        200PCS   18.00
ZS3  0505   DC/DC 5V/5V  3W                         200PCS   18.00
ZS3  0512   DC/DC 5V/12V  3W                        200PCS   18.00
ZW3  0512   DC/DC 5V/+12V -12V  3W                  200PCS   20.00
ZW3  1215   DC/DC 12V/+15V -15V  3W                 200PCS   20.00
ZW3  2415   DC/DC 24V/+15V -15V  3W                 200PCS   20.00
ZW3  0515   DC/DC 5V/+15V -15V  3W                  200PCS   20.00
ZS6  1205   DC/DC 12V/5V  16W                       500PCS   20.00
PP15 48/5   DC/DC 48V/5V 15W 全新                   200PCS   40.00
VI-260-CV   DC/DC 300V/5V 150W                      500PCS   50.00
AL80A300L-063F34 DC/DC 300V/6.3V 34A                200PCS   60.00
VI-261-CY   DC/DC 300V/12V 50W                      500PCS   50.00
VI-261-CU   DC/DC 300V/12V 200W                     500PCS  120.00
VI-2W0-CW   DC/DC 24V/5V 100W                      1000PCS   40.00
VI-230-CU   DC/DC 48V/5V 200W                       200PCS   80.00
VI-JNO-06   DC/DC 48V/5V 60W                        200PCS   65.00
VI-J31-CY   DC/DC 48V/12V 50W                       200PCS   70.00
VI-2NL-CU   DC/DC 48V/28V 200W                      200PCS  180.00
HT-026      DC/DC 24V/5V 40V                        500PCS   12.00
BY05-05S20  DC/DC 5V/5V 1W                          500PCS   18.00
BD512       DC/DC 5V/+12V -12V 1W                   500PCS   18.00
BVW05-100   DC/DC 20-56VDC/5V 1A                    300PCS   18.00
PSR-BD03    DC/DC 48V/12V 3W                        300PCS   21.00
PH300F280-05 DC/DC 300V/5V 300W                     200PCS  120.00
PT500-48    DC/DC 360V/48V 500W                      50PCS  240.00
HG10 48S05  DC/DC 48V/5V 10W                       1000PCS   25.00
HG10 24S05  DC/DC 24V/5V 10W                       2000PCS   25.00
AC/DC电源   输入220 输出5V 80A VICOR电源             500台  180.00
SR330-5     输入220 输出5V 66A 联美兰德电源          300台  210.00
AC/DC电源   输入220 输出5V 60A 全新自产电源         1000台  240.00
AC/DC电源   输入220 输出48V 50A  2400W 电源          200台  580.00
2SK955      5A900V 125W                            2000PCS    3.00
IXYS58N20   58A200V        310W                    1000PCS    8.00
2SK2847     8A900V 150W                            1000PCS    3.20
2SK2333     6A700V                                 1000PCS    1.60
IRFP32N50K  32A 500V         460W                   500PCS    6.80
47N50       47A500V VMOS管 小模块                  2000PCS   21.00
APT5020     27A500V         300W                   1000PCS    5.20
APT8015     44A800V VMOS 小模块                     100PCS   35.00
APT10050    19A1000V VMOS 小模块                    500PCS   24.00
BSM101      200A 50V 3.5毫欧  700w                  100PCS   70.00
IR57N50     57A500V 360W 小模块                     100PCS   24.00
MJH16012    15A500V 150W 三极管                    1000PCS    4.00
MJH16018    10A 800V 150W 三极管                   1000PCS    4.00
MJ10012     10A 500V 150W 达林顿管                 1000PCS    4.00
DEI2*31-06  2*31A 600V  30nS超快恢复管小模块       1000PCS   25.00
SB160       1A60V肖特基二极管                     10000PCS    0.25
MBR2550     25A50V肖特基二极管                     3000PCS    0.90
MBR4050     40A50V肖特基二极管                     2000PCS    2.50
MBR6045     60A45V肖特基二极管                     3000PCS    2.80
Vicor DC/DC 10-400V/2-95V 25W-600W 面议
各大公司DC-DC模块
APC-UPS电源 900-5000VA 800-6000rmb
IGBT.VMOS管模块,磁芯磁环,功率器件 防雷器材
欢迎电讯 量大价更优


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     答 2: uc3889d－－1W还是用开关电源吧！不知大家有什么高招。