B_S-1W
ZLG Power B_S-1W 1W fixed input isolated DC-DC converter with 1500V isolation. Cost-effective solution for industrial...
Product Overview
Description
The ZLG Power B_S-1W is a 1W isolated DC-DC converter module designed for cost-sensitive industrial applications with regulated input voltages. Available with fixed 5V, 12V, or 24V input options, this converter provides 1500V DC isolation suitable for industrial control systems, telecommunications equipment, and IoT devices. Output voltages include 3.3V, 5V, 9V, 12V, and 15V. The SIP-7 package is compatible with standard through-hole assembly processes. Efficiency reaches up to 80%, and the module operates over -40C to +85C temperature range. Protection features include continuous short-circuit protection and input undervoltage lockout.
Product Series
B_S Series
Primary Application
Industrial, Telecom, IOT
Key Features
- Fixed input voltage options (5V, 12V, 24V)
- 1500V DC isolation (1 minute)
- 1W output power rating
- Efficiency up to 80%
- Compact SIP-7 package
- Continuous short-circuit protection
- Operating temperature -40C to +85C
- Low cost for high-volume applications
Specifications
| Input Voltage | 5V (4.5-5.5V), 12V (10.8-13.2V), 24V (21.6-26.4V) |
|---|---|
| Output Voltage | 3.3V, 5V, 9V, 12V, 15V |
| Output Power | 1W |
| Isolation Voltage | 1500V DC (1 minute) |
| Efficiency | Up to 80% |
| Switching Frequency | 100kHz typical |
| Operating Temperature | -40C to +85C |
| Package | SIP-7 |
| Dimensions | 19.5 x 7.0 x 10.0 mm |
Applications
Industrial control systems
Industrial automation and control
Telecommunications equipment
Communication and interface
IoT devices
Electronic system design
Data acquisition systems
Data acquisition and conversion
Sensor interfaces
Sensor signal conditioning
FAE Expert Insights
"The B_S-1W is an excellent cost-effective choice for industrial applications with stable input voltages. I have used this extensively in PLC I/O modules and industrial sensors where 1500V isolation is sufficient. The fixed input design reduces cost compared to wide-input models, making it ideal for high-volume applications. One practical consideration: since this is unregulated, the output voltage will vary with input voltage changes. For 5V input systems with tight output requirements, consider the regulated version or add an LDO after the converter. For thermal design, natural convection is sufficient in most cases. The SIP package is easy to hand-solder for prototypes and works well with wave soldering for production."
Cost-effective 1W isolated converter for industrial applications with regulated input voltages
— David Wang, BeiLuo
Frequently Asked Questions
What is the difference between B_S-1W and E_UHB-1W?
The main differences are: Input voltage: B_S-1W has fixed input (5V, 12V, or 24V) while E_UHB-1W has ultra-wide 4:1 input range; Isolation voltage: B_S-1W provides 1500V DC isolation while E_UHB-1W provides 3000V DC; Cost: B_S-1W is lower cost due to simpler design; Applications: B_S-1W is ideal for regulated bus applications, E_UHB-1W for battery or unregulated sources. Both offer 1W output power and similar efficiency. Choose B_S-1W for cost-sensitive applications with stable input, E_UHB-1W for wide input range or higher isolation requirements.
Select B_S-1W for regulated input applications where cost is primary concern. Select E_UHB-1W for wide input or medical applications.
Can B_S-1W be used with slightly varying input voltage?
B_S-1W can tolerate input voltage variations within the specified range: 5V models: 4.5V to 5.5V (10% variation); 12V models: 10.8V to 13.2V (10% variation); 24V models: 21.6V to 26.4V (10% variation). The output voltage will vary proportionally with input voltage since this is an unregulated converter. For applications with input variations exceeding 10%, consider the E_UHB-1W ultra-wide input series. For very tight output regulation requirements, add an LDO regulator after the converter.
Verify your input voltage stays within specified range. For wider variations, select ultra-wide input models.
What is the typical application for B_S-1W in industrial systems?
Common industrial applications for B_S-1W include: PLC I/O isolation - isolating field I/O from controller electronics; Sensor interfaces - powering and isolating analog sensors; Communication interfaces - isolated RS-485, CAN, or Ethernet power; Motor drive control - isolating control circuits from power stage; Power supply isolation - creating isolated auxiliary supplies. The 1500V isolation is sufficient for most industrial equipment, and the low cost makes it attractive for high-volume applications. The SIP package is compatible with standard industrial PCB assembly processes.
Contact FAE for application-specific recommendations and reference designs for industrial implementations.
How do I calculate the output voltage variation for B_S-1W?
For unregulated converters like B_S-1W, output voltage varies with: Input voltage: Vout = Vin x (Nsec/Npri) x LoadFactor; Load current: Higher load causes voltage droop due to winding resistance; Temperature: Copper winding resistance increases with temperature. Typical variation: +/-5% for input variation within range; +/-5% for load variation from 10% to 100%; +/-2% for temperature variation -40C to +85C. Total variation can be +/-10-12% under worst-case conditions. For applications requiring tighter regulation, use regulated output models or add external regulation.
Calculate worst-case voltage variation for your application. If too wide, consider regulated models or external LDO.
What protection features does B_S-1W include?
B_S-1W includes the following protection features: Continuous short-circuit protection - output current is limited during short circuit, module recovers automatically when short is removed; Input undervoltage lockout (UVLO) - prevents operation when input voltage is too low, ensuring proper startup; Overtemperature protection - internal shutdown if temperature exceeds safe limits, automatic recovery when cooled. Note: B_S-1W does NOT include overvoltage protection on output - external protection may be needed for sensitive loads. The continuous short-circuit protection is particularly valuable for industrial applications where output shorts may occur.
For applications requiring output overvoltage protection, implement external protection circuit or select models with OVP.
Can B_S-1W be used in parallel for higher power?
B_S-1W is not designed for direct parallel operation. The output voltage tolerance between units (typically +/-5%) would cause current imbalance, with one unit supplying most of the current. For higher power requirements: Use a single higher-power module (B_S-2W, B_S-3W, etc.); Use OR-ing diodes for redundant operation (not for current sharing); Consider E_UHB series with higher power ratings. For true parallel operation with current sharing, contact ZLG Power for custom solutions or use external current-sharing controllers.
Select a single module with adequate power rating. Contact FAE for high-power alternatives or custom solutions.