1
crossMAG series
DS-CC6902-EN-rev1.0
Copy Right Reserved by CrossChip Microsystems Inc. 2019
http://www.crosschipmicro.com
CC6902
Fully Integrated, Hall Effect-Based
Linear Current Sensor IC with a Low-Resistance Conductor
GENERAL DESCRIPTION
The CC6902 device is an electrically isolated monolithic current sensor based on Hall Effect. The device provides precise and economical
solutions for AC or DC current sensing in industrial, commercial and communication equipments. It is provided in a small, surface mount
SOP8 package with current sensing range of 5A/10A/20A/30A. Customers can easily complete their PCB design and implementation.
The CC6902 device consists of a precise, low-offset, linear Hall circuit with a copper conduction path located near the surface of the die.
When current flows through the copper conduction path, a magnetic field generates. Meanwhiles the Hall circuit converts this magnetic signal
to output voltage signal.
The Hall circuit based on BiCOMS process integrates a high sensitivity Hall element, oscillator, Hall signal pre-amplifier, CrossChip
®
patented temperature compensation circuit, dynamic offset cancellation circuit, sensitivity trimming circuit and output amplifier. The
temperature compensation circuit ensures good temperature stability of CC6902. Chopper stabilization technique is applied to the Hall circuit
to minimize offset voltage. High chopping frequency up to 1MHz makes CC6902 80kHz band width and ultra-short step input response time
down to typical 2us. Because of this chopper stabilization approach, the output voltage from the Hall IC is desensitized to the effects of
temperature and mechanical stress.
Internal copper conductor’s resistance is typical 1.5mΩ, which provides much less power loss than the universal resistor sampling
method.
Zero current output voltage is 50%VCC. When power supply voltage is 5V, the linear output voltage range is 0.2~4.8V, a range of
0.5~4.5V is recommended for better linearity.
Current sensing range of CC6902 is programmed to a fixed value after packaging, and the range of 5A/10A/20A/30A is available. It’s
operating ambient temperature range is -40~125°C.
FEATURES
Built-in high sensitivity Hall sensor
5V, single supply operation
Zero current output voltage is 50%VCC
Typical primary conductor’s resistance is 1.5mΩ
Current sensing range available: 5A/10A/20A/30A
80kHz bandwidth
2µs output rise time in response to step input current
2kV
RMS
isolation voltage between pins 1-4 and 5-8
Total output error 1% at T
a
=25°C and 3% at T
a
= -40~125°C
CrossChip
®
patented temperature compensation
Output is desensitized to mechanical stress
ESD (HBM) 6000V
Operating ambient temperature: -40~125°C
APPLICATIONS
Motor controller
Load detection and management
Switch-mode power supplies
Over-current fault protection
2
crossMAG series
DS-CC6902-EN-rev1.0
Copy Right Reserved by CrossChip Microsystems Inc. 2019
http://www.crosschipmicro.com
FUNCTION BLOCK DIAGRAM
High SENS.
Hall Plate
SENS. Trim
Oscillator
Dynamic Offset
Cancellation
VCC
GND
OUT
Pre-AMP
Temperature
Compensation
OPA
½ VCC
IP+
IP-
ORDERING INFORMATION
Part No. SENS. (mV/A) Package Packing Form
CC6902SO-05A 400 SOP8 tape reel, 3000 pcs/reel
CC6902SO-10A 200 SOP8 tape reel, 3000 pcs/reel
CC6902SO-20A 100 SOP8 tape reel, 3000 pcs/reel
CC6902SO-30A 67 SOP8 tape reel, 3000 pcs/reel
PINOUT DIAGRAM
IP+ 1
IP+ 2
IP- 3
IP- 4 5 GND
6 NC
7 OUT
8 VCC
SOP8 Package
Name
Number
Description Name
Number
Description
IP+ 1 Current Sampled + GND 5 Ground
IP+ 2 Current Sampled + NC 6 Must be floated
IP- 3 Current Sampled - OUT 7 Analog Voltage Output
IP- 4 Current Sampled - VCC 8 Power Supply