BQ35100
The BQ35100 is an electronic component from Texas Instruments. View the full BQ35100 datasheet below including absolute maximum ratings.
Manufacturer
Texas Instruments
Category
Integrated Circuits (ICs)
Overview
In a SHA-1 one-way hash function, there is no known mathematical method of computing the input given, only the output. The specification of SHA-1, as defined by FIPS 180-4, states that the input consists of 512-bit blocks with a total input length less than 2 64 bits. Inputs that do not conform to integer multiples of 512-bit blocks are padded before any block is input to the hash function. The SHA-1 algorithm outputs the 160-bit digest.
The device generates a SHA-1 input block of 288 bits (total input = 160-bit message + 128-bit key). To complete the 512-bit block size requirement of the SHA-1 function, the device pads the key and message with a 1, followed by 159 0s, followed by the 64 bit value for 288 (000...00100100000), which conforms to the pad requirements specified by FIPS 180-4.
Applications
Figure 12 is a simplified diagram of the main features of the BQ35100 device. Specific implementations detailing the main configuration options are shown later in this section.
Copyright © 2017, Texas Instruments Incorporated
Figure 12. BQ35100 Single-Cell Simplified Implementation
Pin Configuration
Absolute Maximum Ratings
Over-operating free-air temperature range (unless otherwise noted) (1)
| MIN | MAX | UNIT | ||
|---|---|---|---|---|
| V REGIN | Regulator Input Range | -0.3 | 5.5 | V |
| V REG25 | Supply Voltage Range | -0.3 | 2.75 | V |
| V IOD | Open-drain I/O pins (SDA, SCL, VEN) | -0.3 | 5.5 | V |
| V IOD | Open-drain I/O pins (ALERT) | -0.3 | 2.75 | V |
| V BAT | BAT Input Pin | -0.3 | 5.5 | V |
| V I | Input voltage range (SRN, SRP, TS) | -0.3 | V REG25 + 0.3 | V |
| T A | Operating free-air temperature range | -40 | 85 | °C |
| T F | Functional Temperature Range | -40 | 100 | °C |
| T STG | Storage temperature range | -65 | 150 | °C |
| T STG | Lead temperature (soldering, 10 s) | -40 | 100 | °C |
Recommended Operating Conditions
TA =-40°C to 85°C; Typical Values at TA = 25°C CLDO25 = 1.0 μ F, and VREGIN = 3.6 V (unless otherwise noted)
| MIN | NOM | MAX | UNIT | |||
|---|---|---|---|---|---|---|
| V REGIN | Supply Voltage | No operating restrictions | 2.7 | 4.5 | V | |
| V REGIN | No FLASH writes | 2.45 | 2.7 | V | ||
| C REGIN | External input capacitor for internal LDO between REGIN and V SS | Nominal capacitor values specified. Recommend a 10% ceramic X5R type capacitor located close to the device. | 0.1 | μF | ||
| C LDO25 | External output capacitor for internal LDO between V REG25 | Nominal capacitor values specified. Recommend a 10% ceramic X5R type capacitor located close to the device. | 0.47 | 1 | μF | |
| I CC_GELOW (1) | Gas gauge in Disabled mode | GE = Low | 0.05 | μA | ||
| I CC_ACC_AVE (1) | Gas gauge in ACCUMULATOR mode average current | Update every 30 minutes otherwise GE = Low | 0.3 | μA | ||
| I CC_SOH_AVE (1) | State-of-health average current | Update every 8 hours otherwise GE = Low | 0.06 | μA | ||
| I CC_EOS_AVE (1) | End-of-service average current | Update every 8 hours 3- s Load Pulse otherwise GE = Low | 0.35 | μA | ||
| VA1 | Input voltage range (VIN, TS) | V SS - 0.05 | 1 | V | ||
| VA2 | Input voltage range (BAT) | V SS - 0.125 | 5 | V |
Thermal Information
| THERMAL METRIC (1) | BQ35100 TSSOP (PW) | UNIT | |
|---|---|---|---|
| 14 PINS | |||
| R θ JA, High K | Junction-to-ambient thermal resistance | 103.8 | °C/W |
| R θ JC(top) | Junction-to-case(top) thermal resistance | 31.9 | °C/W |
| R θ JB | Junction-to-board thermal resistance | 46.6 | °C/W |
| ψ JT | Junction-to-top characterization parameter | 2.0 | °C/W |
| ψ JB | Junction-to-board characterization parameter | 45.9 | °C/W |
| R θ JC(bottom) | Junction-to-case(bottom) thermal resistance | N/A | °C/W |
Typical Application
The BQ35100 device is a highly configurable device with many options. The major configuration choices comprise the battery chemistry and control methods.
Related Variants
The following components are covered by the same datasheet.
| Part Number | Manufacturer | Package |
|---|---|---|
| BQ35100PW | Texas Instruments | 14-TSSOP (0.173", 4.40mm Width) |
| BQ35100PWR | Texas Instruments |
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