ISL25700 Datasheet, PDF (1/18 Pages) Intersil Corporation – Programmable Temperature Controlled MOSFET Driver

Programmable Temperature Controlled MOSFET Driver
ISL25700
The Temperature Controlled MOSFET Driver is a highly
integrated solution that combines a MOSFET driver with
overcurrent protection and two 8-bit resolution DACs on
a monolithic CMOS integrated circuit (IC).
The ISL25700 sets up and monitors temperature at the
point of interest, compares it with the user programmable
setpoint, and adjusts the output until the set temperature is
reached. An external power MOSFET, a heater, an NTC
thermistor and the ISL25700 are parts of the temperature
control loop.
It also features programmable overcurrent protection of
the MOSFET. The current protection automatically adjusts
the output voltage in order to keep MOSFET power under
user defined limits. The protection settings always
override the temperature settings that cause violation of
the current limit.
There is an additional 8-bit General Purpose DAC that is
available for application specific use.
The ISL25700 can be used in a variety of applications
where constant temperature is a key parameter.
Applications*(see page 17)
• Oven Controlled Applications with Micro Temperature
Chamber in:
- Basestations
- Spectrometers
- Precision Meters
- Precision Generators
Features
• User-programmable Setpoint via I²C Serial Interface
• Setpoint Temperature Range from +40°C to +110°C
• Operational Temperature Range from -40°C to +125°C
• 3°C Initial Setpoint Accuracy
• Coarse and Fine Tuning Setpoint Control
- +15°C Coarse Adjustment
- +0.1°C Fine Adjustment
• ±0.5°C Long-term Drift Error
• Programmable Current Protection of External MOSFET
• 5-bit Selectable Gain Control
• Wide Power Supply Range: 3V to 15V
• Works with 20kΩ to 200kΩ External NTC Thermistor
• General Purpose 8-bit DAC - 0.4% Output Resolution
• High Reliability
- Endurance: 10,000 Data Changes per Bit per Register
- Register Data Retention: 10 years @ T ≤ +125°C
• 10 Lead μTQFN 2.1mmx1.6mm Package
• Pb-free (RoHS Compliant)
100
80
60
40
20
0
0
3
6
9
12
15
TIME (MINUTES)
FIGURE 1. TYPICAL TEMPERATURE SETTLING TIME
September 3, 2010
FN6885.0
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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