L6610D STMicroelectronics, L6610D Datasheet
L6610D
Specifications of L6610D
Available stocks
Related parts for L6610D
L6610D Summary of contents
Page 1
... APPLICATIONS SWITCHING POWER SUPPLIES FOR DESKTOP PC'S, SERVERS AND WEB SERVERS SUPERVISOR FOR DISTRIBUTED POWER MAIN CONTROL AUXILIARY CONTROL L6610 BCD TECHNOLOGY SDIP24 SO24 ORDERING NUMBERS: L6610D L6610DTR(T & Reel) +12V +5V COM -5V -12V +3.3V +5Vaux Bout Dmon VDD 12V Cout 5V -5V ...
Page 2
Logic and Programmable Trimming ...
Page 3
DESCRIPTION The L6610 is a control and housekeeping IC developed in BCD technology intended for acting at the sec- ondary side of desktop PC's or server's switching power supplies, in presence of standard voltage rails (+3.3V, ±5V, ±12V) ...
Page 4
L6610 PIN DESCRIPTION (continued) Pin # Name Output of the error amplifier for the main converter. This pin typically drives an optocoupler and is 4 Aout also used for compensation along with Ainv (pin #5). Main loop error amplifier inverting ...
Page 5
PIN DESCRIPTION (continued) Pin # Name -12V UV/OV monitor. If connected to a voltage greater than 1.5V (e.g. VREF, #16), the function 17 -12V will be disabled. -5V UV/OV monitor. If connected to a voltage greater than 1.5V (e.g. VREF, ...
Page 6
L6610 FUNCTION DESCRIPTION (continued) Name The PS-ON signal input has debounce logic to prevent improper activation. All of the monitored Debounce inputs have digital filtering/debounce logic on board for high noise immunity. AC sense hysteresis. Programmable hysteresis is provided on ...
Page 7
ELECTRICAL CHARACTERISTCS (unless otherwise specified 105° PS-ON = low) Dmon DD Symbol Parameter SUPPLY SECTION V Start-up threshold DD(ON) V Minimum operating voltage after DD(OFF) turn-on V Hysteresis DD(H) V ...
Page 8
L6610 ELECTRICAL CHARACTERISTCS (continued) (unless otherwise specified 105° PS-ON = low) Dmon DD Symbol Parameter -12V bias current Vout = -5V UV -5V undervoltage OV -5V overvoltage V -5V disable ...
Page 9
ELECTRICAL CHARACTERISTCS (continued) (unless otherwise specified 105° PS-ON = low) Dmon DD Symbol Parameter DF DFAULT output high source IOH current D DFAULT output high voltage FVOH V DFAULT output ...
Page 10
L6610 ELECTRICAL CHARACTERISTCS (continued) (unless otherwise specified 105° PS-ON = low) Dmon DD Symbol Parameter Z Divider impedance FB Temperature coefficient W Divider 5/12 weighting 5 A Voltage gain VOL ...
Page 11
ELECTRICAL CHARACTERISTCS (continued) (unless otherwise specified 105° PS-ON = low) Dmon DD Symbol Parameter PSRR Power supply rejection ratio I Output sink current OUTL I Output source current OUTH V ...
Page 12
L6610 TYPICAL ELECTRICAL CHARACTERISTICS Figure 1. Supply start-up, UV and OV V [V] DD 6.5 over voltage 5.5 start-up 4.5 UV 3.5 -50 - Figure 2. IC Supply current vs. supply voltage ...
Page 13
TYPICAL ELECTRICAL CHARACTERISTICS (continued) Figure 7. 5V fault thresholds V [ overvoltage 5 4 undervoltage 3 -50 - Figure 8. 12V fault thresholds V [V] +12V 15 14 overvoltage ...
Page 14
L6610 TYPICAL ELECTRICAL CHARACTERISTICS (continued) Figure 13. External voltage reference. [V] 2.7 2.6 2.5 2.4 2.3 -50 - 100 125 150 Figure 15. Error amplifiers ( Gain and Phase 200 ...
Page 15
On board digital trimming and mode selection..................................................................................Page 16 2 Error amplifiers and reference voltages ..................................................................................................... 18 Main section: error amplifier A and Soft -Start E/A and reference voltage 3.3V section: error amplifier B Auxiliary section: error amplifier C 3 ...
Page 16
L6610 APPLICATION INFORMATION 1 ONBOARD DIGITAL TRIMMING AND MODE SELECTION By forcing the PROG input pin high, the chip enters programming mode: the multifunction pins PW_OK and PS_ON are then disconnected from their normal functions (output pins) and are connected ...
Page 17
Table 2. Trim Coding E/A A threshold Parameter 2.5V typ. Address 0001 Tuning Bits [mV +112 + ...
Page 18
L6610 2 ERROR AMPLIFIERS AND REFERENCE VOLTAGES Three error amplifiers are implemented on the IC to achieve regulation of the output voltages: a brief description follows for each section. – Main section: error amplifier A and Soft-Start. The circuit is ...
Page 19
Between these pins it is connected the compensation network (Z improve response time. The feedback control circuit determines the magamp "off" time, converting the voltage at the output of error ...
Page 20
L6610 3 NORMAL OPERATION TIMING DIAGRAM (FIG. 20) The time intervals t1-t5 are listed below – t1: UV/OC blanking of MFAULT. While Main outputs are ramping up, the UV comparators are blanked for this interval to prevent a false turn-off. ...
Page 21
UNDERVOLTAGE, OVERVOLTAGE, OVERCURRENT DETECTION AND RELEVANT TIMINGS The IC provides on-board undervoltage and overvoltage protection for 3V3, ±5V, ±12V Main input pins and Dmon auxiliary input pin. Overcurrent protection is available for 12V and 5V or 3.3V, digitally selectable. ...
Page 22
L6610 DFAULT; in the "Application ideas" section, another simple circuit is showed to guarantee the same pro- tection without the SCR. – Dmon input undervoltage: when an undervoltage on Dmon is detected, MFAULT is put high, Cout is pulled low ...
Page 23
AC SENSE (MAINS UNDERVOLTAGE WARNING) The device monitors the primary bulk voltage and warns the system when the power is about to be lost pulling down the PW_OK output. The ACsns pin is typically connected to one of the ...
Page 24
L6610 Simply connecting the power supply outputs to the L6610 relevant pins ensures the protection against over/un- dervoltage in the Main section; the protection against overcurrent can be achieved (for 12V and 5V or 3.3V) adding a small sense resistor. ...
Page 25
Figure 25. Secondary side with current sharing R SENSE R SENSE FAULT 12V Bin 5V Bout 3V3 Aout PROG Ain GND 12Visns GND 5V/3V3isns -5 Cout -12 Cin VREF to SGND DMON PS-ON DFAULT PW-OK Vdd ACsns L6610 +5Vaux L6610 ...
Page 26
L6610 7 APPLICATION IDEAS In fig circuit is suggested to obtain the regulated +3.3V output with a linear configuration instead of the Magamp circuitry. In this case the output of the E/A modulates the gate-source voltage of a ...
Page 27
DIM. MIN. TYP. MAX. MIN. A 2.35 2.65 0.093 A1 0.10 0.30 0.004 A2 2.55 B 0.33 0.51 0.013 C 0.23 0.32 0.009 D 15.20 15.60 0.598 E 7.40 7.60 0.291 e 1.27 H 10.0 10.65 0.394 h 0.25 ...
Page 28
L6610 mm DIM. MIN. TYP. MAX. A 5.08 A1 0.51 0.020 A2 3.05 3.30 4.57 0.120 B 0.36 0.46 0.56 0.0142 0.0181 0.0220 B1 0.76 1.02 1.14 0.030 c 0.23 0.25 0.38 0.009 D 22.61 22.86 23.11 0.890 E 7.62 ...
Page 29
... No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics ...