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Part Number: PBL3771/1
Description: The PBL 3771/1 is a switch-mode, constant-current driver IC (chopper) with two channels, one for each ...
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PBL3771/1
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DataSheet
General Description
PBL3771/1 General Description
The PBL 3771/1 is a switch-mode, constant-current driver IC (chopper) with two channels, one for each winding of a two-phase stepper motor. The circuit is especially developed for use in microstepping applications in conjunction with the matching dual DAC (Digital-to-Analog Converter) PBM 3960. A complete driver system consists of these two ICs, a few passive components and a microprocessor for generation of the proper control and data codes required for microstepping.
The PBL 3771/1 contains a clock oscillator, which is common for both driver channels; a set of comparators and flip-flops implementing the switching control; and two H-bridges with internal recirculation diodes. Voltage supply requirements are +5 V for logic and +10 to +45 V for the motor. Maximum output current is 650 mA per channel.
A special logic function is used to select slow or fast current decay in the output stage for improved high-speed microstepping.
The close match between the two driver channels guarantees consistent output current ratios and motor positioning accuracy.
PBL3771/1 Maximum Ratings
| Parameter | Pin no. (DIL) | Symbol | Min. | Max | Unit |
| Voltage | |||||
| Logic supply | 11 | VCC | 0 | 7 | V |
| Motor supply | 3, 20 | VMM | 0 | 45 | V |
| Logic inputs | 7, 8, 15, 16 | VI | -0.3 | 6 | V |
| Comparator inputs | 10, 13 | VC | -0.3 | VCC | V |
| Reference inputs | 9, 14 | VR | -0.3 | 7.5 | V |
| Current | |||||
| Motor output current | 1, 4, 19, 22 | IM | -700 | +700 | mA |
| Logic inputs | 7, 8, 15, 16 | II | -10 | mA | |
| Analog inputs | 10, 13 | IA | -10 | mA | |
| Oscillator charging current | 12 | IRC | 5 | mA | |
| Temperature | |||||
| Operating junction temperature | TJ | -40 | +150 | ||
| Storage temperature** | TS | -55 | +150 |
** Circuit only. The packaging can handle max 60
PBL3771/1 Features
• Dual chopper driver in a single package.
• 650 mA output current per channel.
• Close matching between channels for high microstepping accuracy.
• Selectable slow/fast current decay for improved high-speed microstepping.
• Improved low-level linearity.
• Specially matched to Dual DAC PBM 3960.
• Selection of packages, 22-pin "batwing" DIP, 24 pin "batwing" SOIC or 28-lead PLCC with lead-frame for heat-sinking through PC board copper.
PBL3771/1 Connection Diagram
PBL3771/1NS
PDF/DataSheet Download
- Datasheet: PBL3771/1NS
- File Size: 157848 KB
- Manufacturer: ERICSSON [Ericsson]
- Click here to Download
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