Features: ·Line UVLO Monitoring
·Low Current Sense Voltage for Resistive Current Sensing
·External Synchronization to Higher or Lower Frequency Oscillator (CS5126 Only)
·Bias for Start up Circuitry (CS5124 Only)
·Thermal Shutdown
·Sleep On/Off Pin
·Soft Start Timer
·Leading Edge Blanking
·Direct Optocoupler Interface
·90ns Propagation Delay
·35ns Driver Rise and Fall Times
·Sleep ModePinout
Specifications
|
Pin Symbol |
Lead Name |
VMAX |
VMIN |
ISOURCE |
ISINK |
| VCC |
VCC Power Input |
20V |
-0.3V |
1mA |
1.5A Peak
200mA DC |
| SYNC (CS5126) |
Clock Synchronization Input |
20V |
-0.3V |
1mA |
1mA |
| VBIAS (CS5124) |
VCC Clamp Output |
20V |
-0.3V |
1mA |
1mA |
| UVLO |
UVLO Shutdown Input |
6V |
-0.3V |
1mA |
1mA |
| SS |
Soft Start Capacitor Input |
6V |
-0.3V |
1mA |
2mA |
| VFB |
Voltage Feed Back Input |
6V |
-0.3V |
3mA |
20mA |
| ISENSE |
Current Sense Input |
6V |
-0.3V |
1mA |
1mA |
| GROUND |
Ground |
0V |
0V |
1.5A peak
200mA DC |
1mA |
| GATE |
Gate Drive Output |
20V |
-0.3V |
1.5A Peak
200mA DC |
1.5A Peak
200mA DC |
Operating Junction Temperature, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 to 135°C
Storage Temperature Range, TS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40 to 150°C
ESD (Human Body Model) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2kV
ESD (Machine Model) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .200V
Lead Temperature Soldering: Reflow (SMD styles only) ..60 sec. max above 183°C, 230°C peakDescriptionThe CS5124/6 is a fixed frequency current mode controller designed specifically for DC-DC converters found in the telecommunications industry. The CS5124/6 integrates many commonly required current mode power supply features and allows the power supply designer to realize substantial cost and board space savings. The product matrix is as follows:
CS5124: 400kHz w/VBIAS Pin, 195mV first current sense threshold
CS5126: 200kHz w/SYNC Pin, 335mV first current sense threshold
The CS5124/6 integrates the following features: Internal Oscillator, Slope Compensation, Sleep On/Off, Under Voltage Lock Out, Thermal Shutdown, Soft Start Timer, Low Voltage Current Sense for Resistive Sensing, Second Current Threshold for Pulse by Pulse Over Current Protection, a Direct Optocoupler Interface and Leading Edge Current Blanking.
The CS5124/6 has supply range of 7.7V to 20V and is available in 8 pin SO narrow package.
CS5124 Data Sheet
