Si9110 9111 Si9111

Datasheets.org.uk - 100 Million Datasheets from 7500 Manufacturers.

Datasheet Thumbnail

Top Searches for this datasheet

Si9110DY - Si9110DY
SI9110AK - SI9110AK
P-34830 - P-34830
Depletion MOSFET - Depletion MOSFET
D469A - D469A
2N7004* - 2N7004*
Si9110 - Si9110
9111 - 9111
Si9111 - Si9111

Si9110/9111
High-Voltage Switchmode Controllers
120-V Input Range Current-Mode Control High-Speed, Source-Sink Output Drive High Efficiency Operation 80%) Internal Start-Up Circuit Internal Oscillator MHz) SHUTDOWN RESET Reference Selection Si9110 Si9111 "10%
Description
Si9110/9111 BiC/DMOS integrated circuits designed high-performance switchmode controllers. high-voltage DMOS input allows controller work over wide range input voltages (10to 120-VDC). Current-mode control circuitry implemented CMOS reduce internal power consumption less than push-pull output driver provides high-speed switching MOSPOWER devices large enough supply output power. When combined with output MOSFET transformer, Si9110/9111 used implement single-ended power converter topologies (i.e., flyback, forward, cuk). Si9110/9111 available 14-pin plastic DIP, SOIC CerDIP packages, specified over military, suffix (-55 125_C) industrial, suffix (-40 85_C) temperature ranges.
Functional Block Diagram
Error Amplifier VREF BIAS Undervoltage Comparator Current Sources Internal Circuits Comparator SENSE Current-Mode Comparator COMP DISCHARGE
Clock fOSC)
OUTPUT -VIN
+VIN
SHUTDOWN RESET
Pre-Regulator/Start-Up Subsequent updates this data sheet obtained facsimile calling Siliconix FaxBack, 1-408-970-5600. Please request FaxBack document #1305.
Siliconix P-34830-Rev. 25-Apr-94
Si9110/9111
Absolute Maximum Ratings
Voltages Referenced -VIN (Note: +VIN +VIN Logic Inputs (RESET, SHUTDOWN, OUT) -0.3 Linear Inputs (FEEDBACK, SENSE, BIAS, VREF) -0.3 Pre-Regulator Input Current (continuous) Storage Temperature 150_C Operating Temperature Suffix) 125_C Suffix) 85_C Notes Device mounted with leads soldered welded board. Derate mW/_C above 50_C. Derate mW/_C above 25_C. Derate mW/_C above 25_C. Power Dissipation (Package)a 14-Pin CerDIP Suffix)b 1000 14-Pin Plastic Suffix)c 14-Pin SOIC Suffix)d Thermal Impedance (QJA) 14-Pin CerDIP 100_C/W 14-Pin Plastic 167_C/W 14-Pin SOIC 140_C/W
Junction Temperature (TJ) 150_C
Recommended Operating Range
Voltages Referenced -VIN 13.5 +VIN fOSC ROSC Linear Inputs Digital Inputs
Specificationsa
Test Conditions Unless Otherwise Specified
DISCHARGE -VIN +VIN RBIAS ROSC
Suffix
125_C
Suffix
85_C
Parameter Reference
Symbol
Tempb Typc Mind
Maxd Mind
Maxd
Unit
Si9110 Output Voltage (OSC Disabled) Si9111 Si9110 Si9111 Output Impedancee Short Circuit Current Temperature Stabilitye ZOUT ISREF TREF VREF -VIN
Room Room Full Full Room Room Full
3.92 3.60 3.82 3.50
4.08 4.40 4.16 4.48
3.92 3.60 3.86 3.52
4.08 4.40 4.14 4.46 mV/_C
0.50
Oscillator
Maximum Frequencye Initial Accuracy Voltage Stability Temperature Coefficiente fMAX fOSC Df/f TOSC ROSC ROSC Note ROSC Note Df/f=f(13.5 f(9.5 f(9.5 Room Room Room Room Full ppm/_C
Error Amplifier
Feedback Input Voltage Input BIAS Current Tied COMP (OSC Disabled) Si9110 Si9111 Room Room Room 4.00 4.00 3.96 3.60 4.04 4.40 3.96 3.60 4.04 4.40
VIN,
Siliconix P-34830-Rev. 25-Apr-94
Si9110/9111
Specificationsa
Test Conditions Unless Otherwise Specified
DISCHARGE -VIN +VIN RBIAS ROSC
Suffix
125_C
Suffix
85_C
Parameter
Symbol
Tempb Typc Mind
Maxd Mind
Maxd
Unit
Error Amplifier (Cont'd)
Input OFFSET Voltage Open Loop Voltage Gaine Unity Gain Bandwidthe Dynamic Output Impedancee Output Current AVOL ZOUT IOUT Source (VFB Sink (VFB Power Supply Rejection PSRR 13.5 (OSC Disabled) Room Room Room Room Room Room Room 1000 -2.0 0.15 0.12 2000 -1.4 0.12 2000 -1.4
Current Limit
Threshold Voltage Delay Outpute VSOURCE VSENSE Figure Room Room
Pre-Regulator/Start-Up
Input Voltage Input Leakage Current Pre-Regulator Start-Up Current Pre-Regulator TurnOff Threshold Voltage Undervoltage Lockout VREG -VUVLO +VIN +IIN ISTART VREG VUVLO VDELTA Pulse Width VULVO IPRE-REGULATOR Room Room Room Room Room Room
Supply
Supply Current Bias Current IBIAS CLOAD (Pin Room Room 0.45 0.45
Logic
SHUTDOWN Delaye SHUTDOWN Pulse Widthe RESET Pulse Widthe Latching Pulse Width SHUTDOWN RESET Lowe Input Voltage Input High Voltage Figure VSENSE -VIN Figure Figure Room Room Room Room Room Room
Siliconix P-34830-Rev. 25-Apr-94
Si9110/9111
Specificationsa
Test Conditions Unless Otherwise Specified
DISCHARGE -VIN +VIN RBIAS ROSC
Suffix
125_C
Suffix
85_C
Parameter Logic (Cont'd)
Input Current Input Voltage High Input Current Input Voltage
Symbol
Tempb Typc Mind
Maxd Mind
Maxd
Unit
Room Room
Output
Output High Voltage Output Voltage Output Resistance Rise Timee Fall Timee ROUT IOUT IOUT IOUT Source Sink Room Full Room Full Room Full Room Room 0.30 0.50 0.30 0.50
Notes Refer PROCESS OPTION FLOWCHART additional information. Room 25_C, Full determined operating temperature suffix. Typical values DESIGN ONLY, guaranteed subject production testing. algebraic convention whereby most negative value minimum most positive maximum. Guaranteed design, subject production test. CSTRAY
Timing Waveforms
SENSE OUTPUT OUTPUT SHUTDOWN
Figure
Figure
SHUTDOWN RESET
Figure
Siliconix P-34830-Rev. 25-Apr-94
Si9110/9111
Typical Characteristics
+VIN +IIN Start-Up
-VIN
Output Switching Frequency Oscillator Resistance
+IIN (mA)
(Hz) rOSC
Configurations
Dual-In-Line SOIC
BIAS +VIN SENSE OUTPUT -VIN View COMP RESET SHUTDOWN VREF DISCHARGE Order Numbers CerDIP: Si9110AK Plastic DIP: Si9110DJ, Si9111DJ SOIC: Si9110DY, Si9111DY
Detailed Description
Pre-Regulator/Start-Up Section
quiescent current requirement Si9110/9111 control circuitry, bias power supplied from unregulated input power source, from external regulated low-voltage supply, from auxiliary "bootstrap" winding output inductor transformer. When power first applied during start-up, +VIN (pin will draw constant current. magnitude this current determined high-voltage depletion MOSFET device which connected between +VIN (pin This start-up circuitry provides initial power charging external bypass capacitance connected pin. constant current disabled when exceeds forced exceed 8.6-V threshold, then Siliconix P-34830-Rev. 25-Apr-94 will regulated nominal value pre-regulator circuit. supply voltage rises toward normal operating conditions, internal undervoltage (UV) lockout circuit keeps output driver disabled until exceeds undervoltage lockout threshold (typically This guarantees that control logic will functioning properly that sufficient gate drive voltage available before MOSFET turns design such that undervoltage lockout threshold will least less than pre-regulator turn-off voltage. Power dissipation minimized providing external power source such that constant current source always disabled.
Si9110/9111
Detailed Description (Cont'd)
Note: During start-up when drops below start-up circuit capable sourcing This lead high level power dissipation (for 48-V input, approximately Excessive start-up time caused external loading supply result device damage. Figure gives typical pre-regulator current BiC/DMOS function input voltage. amplifier (VREF) internally connected output reference supply should bypassed with small capacitor ground.
Oscillator Section
oscillator consists ring CMOS inverters, capacitors, capacitor discharge switch. Frequency external resistor between pins. (See Figure details resistor value frequency.) DISCHARGE should tied -VIN normal internal oscillator operation. frequency divider logic section limits switch duty cycle locking switching frequency half oscillator frequency. Remote synchronization accomplished capacitive coupling positive SYNC pulse into (pin terminal. pulse amplitude 0.5-ms pulse width, typical values would series with
BIAS
properly bias Si9110/9111, 390-kW resistor should tied from BIAS (pin -VIN (pin This determines magnitude bias current analog sections pull-up current SHUDOWN RESET pins. current flowing bias resistor nominally
Reference Section
reference section Si9110 consists temperature compensated buried zener trimmable divider network. output reference section connected internally non-inverting input error amplifier. Nominal reference output voltage trimming procedure that used Si9110 brings output error amplifier (which configured unity gain during trimming) within This compensates input offset voltage error amplifier. output impedance reference section been purposely made high that impedance external voltage source used override internal voltage source, desired, without otherwise altering performance device. Applications which separate external reference, such non-isolated converter topologies circuits employing optical coupling feedback loop, require trimmed voltage reference with accuracy. Si9111 accommodates requirements these applications lower cost, leaving reference voltage untrimmed. accurate reference thus provided sufficient establish bias point error amplifier.
SHUTDOWN RESET
SHUTDOWN (pin RESET (pin intended overriding output MOSFET switch external control logic. inputs through latch preceding output switch. Depending logic state RESET, SHUTDOWN either latched unlatched input. output whenever SHUTDOWN low. simultaneously having SHUTDOWN RESET low, latch SHUTDOWN effect until RESET goes high. truth table these inputs given Table
Table Truth Table SHUTDOWN RESET Pins SHUTDOWN
RESET
Output
Normal Operation Normal Operation Change) (Not Latched) (Latched) (Latched, Change)
Error Amplifier
Closed-loop regulation provided error amplifier, which intended with "around-the-amplifier" compensation. differential input stage provides input current. noninverting input error
Both pins have internal current source pull-ups should left disconnected when use. added feature current sources ability connect capacitor open-collector driver SHUTDOWN RESET pins provide variable shutdown time. Siliconix P-34830-Rev. 25-Apr-94
Si9110/9111
Detailed Description (Cont'd)
Output Driver
push-pull driver output typical on-resistance Maximum switching times specified 500-pF load. This sufficient directly drive MOSFETs such 2N7004, 2N7005, IRFD120 IRFD220. Larger devices driven, switching times will longer, resulting higher switching losses. order drive large MOSPOWER devices, necessary external driver such Siliconix D469A. D469A switch very large devices such SMM20N50 (500 approximately
Applications
1N5822 SYNC PULSE Needed) 0.75
0.022 FEEDBACK 1N5819 0.25 1N4148 2N7004 Feedback
Si9110
Figure 5-Watt Power Supply Telecom Applications
Siliconix P-34830-Rev. 25-Apr-94

Si9110 9111 Si9111

Top Searches for this datasheet

Other recent searches