the si85xx unidirectional ac current sensor development kit contains one of two versions of the 10-a, si8512-based evaluation board or one version of the 20 a si8513 based evaluation board.

51电子网公益库存:

HV803

B32520C3683K189

F54F190DMQB

J0011D21

MX7821KEWP

W004CHC

U0603C060DNT

U53C16126HK40

Y1004DN

Z8400BC1

the si85xx target boards provide a means of evaluating the ac current sensor in an existing application. the boards are meant to be soldered directly into a user’s existing power supply and come with either the si8512 installed (10 a full-scale input range) or with the si8513 installed (20 a full-scale input range). silabs 公司的si85xx开关电源电流检测器，满刻度值为5a，10a和20a，初级串通电阻小于1.3毫欧姆，电感小于2nh，输入频率从50 khz 到1 mhz，具有一流的噪音抑制特性，工作温度 40 到125℃，主要用在电源（ac/dc和dc/dc转换器），ups系统，马达控制，照明设备以及工业设备。本文介绍了si85xx主要特性，功能方框图，多种应用电路以及三种目标板电路图和相应的材料清单（bom）。



图5。si85xx20aqn-tb 1 kv, 20 amp 目标板外形图

图6。si85xx tb目标板电路图(1 kv, 10 a目标板)

si85xx tb目标板材料清单(1 kv, 10 a目标板)：


图7。si85xx5kv- tb目标板电路图(5 kv, 10 a目标板)
si85xx5kv- tb目标板材料清单（5 kv, 10 a目标板)：



图8。si85xx目标板电路图(1 kv, 20 a目标板)
si85xx20aqfn - tb目标板材料清单（1 kv, 20 a目标板)：
si85xx主要特性：

single-chip ac current sensor

low loss: <1.3 mohm primary series resistance and <2 nh inductance

leading-edge noise suppression eliminates need for leading-edge blanking

"ping-pong" output version allows one si85xx to replace two current transformers in full-bridge designs

5, 10, and 20 a full-scale versions

±5% initial accuracy

50 khz to 1 mhz input frequency range

fault output to safeguard operation

large 2 vpp min output at full scale

high-side or low-side current sensing

compact 4x4x1 mm qfn package (1 kvrms isolation)

20-pin wide-body soic (5 kvrms isolation)

40 to 125℃ operating range

ul/vde/csa approval

si85xx应用：

power supplies

motor controls

lighting equipment

industrial equipment

图1。si85xx 系列功能方框图

图2。si850x 单相降压转换器

图3。si851x 全桥转换器

图4。si851x 采用默认tr值的推挽应用案例