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Cirrus Logic, Inc.

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CS1610/11

CS1612/13

TRIAC Dimmable LED Driver IC

Features & Description

• Best-in-class Dimmer Compatibility

- Leading-edge (TRIAC) Dimmers

- Trailing-edge Dimmers

- Digital Dimmers (with Integrated Power Supply)

• Up to 90% Efficiency

• Optimized for 25W Input Power

• Flicker-free Dimming

• 0% Minimum Dimming Level

• Quasi-resonant Second Stage with Constant-current Output

- Flyback and Buck

• Fast Startup

• Tight LED Current Regulation: Better than ±5%

• Primary-side Regulation (PSR)

• >0.9 Power Factor

• IEC-61000-3-2 Compliant

•Soft Start

• Protections:

- Output Open/Short

- Current-sense Resistor Open/Short

- External Overtemperature Using NTC

Overview

The CS1610/11/12/13 is a digital control IC engineered to deliver

a high-efficiency, cost-effective, flicker-free, phase-dimmable,

solid-state lighting (SSL) solution for the incandescent lamp

replacement market. The CS1610/11 is designed to control a

quasi-resonant flyback topology. The CS1612/13 is designed to

control a buck topology. The CS1610/12 and CS1611/13 are

designed for 120VAC and 230VAC line voltage applications,

respectively.

The CS1610/11/12/13 integrates a critical conduction mode

(CRM) boost converter that provides power factor correction and

dimmer compatibility with a constant output current, quasi-

resonant second stage. An adaptive dimmer compatibility

algorithm controls the boost stage and dimmer compatibility

operation mode to enable flicker-free operation to <2% output

current with leading-edge, trailing-edge, and digital dimmers

(dimmers with an integrated power supply).

Applications & Description

• Dimmable Retrofit LED Lamps

• Dimmable LED Luminaries

• Offline LED Drivers

• Commercial Lighting

Ordering Information

See page 15.

LED+

LED-

R12

NTC

Z2C8

R11

R13

FB GA IN

CS1610/11

IAC

SOURCE

FBGAIN

FBAUX

BSTOUT

GNDSGND

IPK

CLAMP

FBSENSE

eOTP

BSTAUX

VDD

R10

NTC

IP K

BR1 BR1

Mains

BR1 BR1

Z1 C4

rect

BST

MAY’13

DS929F6

Summary of content (16 pages)

PAGE 1
CS1610/11 CS1612/13 TRIAC Dimmable LED Driver IC Features & Description Overview • Best-in-class Dimmer Compatibility - Leading-edge (TRIAC) Dimmers - Trailing-edge Dimmers - Digital Dimmers (with Integrated Power Supply) • Up to 90% Efficiency • Optimized for 25W Input Power • Flicker-free Dimming • 0% Minimum Dimming Level • Quasi-resonant Second Stage with Constant-current Output - Flyback and Buck • Fast Startup • Tight LED Current Regulation: Better than ±5% • Primary-side Regulation (PSR) • >0.
PAGE 2
CS1610/11/12/13 1.
PAGE 3
CS1610/11/12/13 2.
PAGE 4
CS1610/11/12/13 3. CHARACTERISTICS AND SPECIFICATIONS 3.1 Electrical Characteristics Typical characteristics conditions: • TA = 25 °C, VDD = 12V, GND = 0 V • All voltages are measured with respect to GND. • Unless otherwise specified, all currents are positive when flowing into the IC. Parameter Minimum/Maximum characteristics conditions: • TJ = -40°C to +125 °C, VDD = 11V to 17V, GND = 0 V Condition Symbol Min Typ Max Unit After Turn-on VDD 11 - 17 V VDD Increasing VST(th) - 8.
PAGE 5
CS1610/11/12/13 Parameter Condition Symbol Min Typ Max Unit VFBZCD(th) - 200 - mV tFBZCB - 2 2.8 - s s IZCD -2 - - mA - VDD +0.6 - V Minimum On Time - 0.55 - s Maximum On Time CS1610/11/13 CS1612 - 8.8 12.
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CS1610/11/12/13 3.2 Thermal Resistance Symbol Parameter Value Unit JA Junction-to-Ambient Thermal Impedance 2 Layer PCB 4 Layer PCB 84 47 °C/W °C/W JC Junction-to-Case Thermal Impedance 2 Layer PCB 4 Layer PCB 39 31 °C/W °C/W 3.3 Absolute Maximum Ratings Characteristics conditions: All voltages are measured with respect to GND. Pin Symbol 14 VDD Parameter IC Supply Voltage Value Unit 18.5 V 1, 2, 5, 8, 9, 10,11,15,16 Analog Input Maximum Voltage -0.5 to (VDD +0.
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CS1610/11/12/13 4. TYPICAL PERFORMANCE PLOTS 3 8 2 4 IDD (mA) UVLO Hysteresis 6 Falling Edge Rising Edge 2 1 0 0 -50 0 50 100 -2 150 0 Temperature (ºC) 2 4 6 8 10 12 14 16 18 20 VDD (V) Figure 4. Supply Current vs. Voltage Figure 3. UVLO Characteristics 10 20 19.5 VDD (V) 9 VZ (V) Turn On 19 8 18.5 Turn Oī 18 7 -50 0 50 100 -50 150 0 50 150 Figure 6. Zener Voltage vs. Temperature Figure 5. Turn On/Off Threshold Voltage vs. Temperature 40 0.5 0.
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CS1610/11/12/13 5. GENERAL DESCRIPTION 5.1 Overview The CS1610/11/12/13 is a digital control IC engineered to deliver a high-efficiency, cost-effective, flicker-free, phasedimmable, solid-state lighting (SSL) solution for the incandescent lamp replacement market. The CS1610/11 is designed to control a quasi-resonant flyback topology. The CS1612/13 is designed to control a buck topology. The CS1610/12 and CS1611/13 are designed for 120VAC and 230VAC line voltage applications, respectively.
PAGE 9
CS1610/11/12/13 5.4 Boost Stage The high-voltage FET in the source-follower startup circuit is source-switched by a variable current source on the SOURCE pin to operate a boost circuit. Peak FET switching current is set with an external resistor on pin IPK. In No-Dimmer Mode, the boost stage begins operating when the start threshold is reached during each rectified half line-cycle and is disabled at the nominal boost output voltage.
PAGE 10
CS1610/11/12/13 5.4.3 Boost Auxiliary Winding The boost auxiliary winding is used for zero-current detection (ZCD). The voltage on the auxiliary winding is sensed through the BSTAUX pin of the IC. It is also used to deliver current during steady-state operation, as mentioned in section 5.2 Startup Circuit on page 8. 5.4.4 Boost Overvoltage Protection The CS1610/11/12/13 supports boost overvoltage protection (BOP) to protect the bulk capacitor C8 (see Figure 12 on page 10).
PAGE 11
CS1610/11/12/13 A quasi-resonant buck stage is illustrated in Figure 13. The buck stage is controlled by measuring current in the buck inductor and voltage on the auxiliary winding. VB S T The FBGain input is set using resistor RFBGAIN . Resistor RFBGAIN must be selected to ensure that the switching period TT is greater than the resonant switching period Tcritical at maximum output power. See Equation 5: LED + TT   T critical = T1 + T2  [Eq.
PAGE 12
CS1610/11/12/13 5.7.4 Overcurrent Protection Overcurrent protection (OCP) is implemented by monitoring the voltage across the second stage sense resistor. If this voltage exceeds the threshold voltage VOCP(th) of 1.69V, a fault condition occurs. The IC output is disabled, and the controller attempts to restart after one second. 5.7.
PAGE 13
CS1610/11/12/13 For external overtemperature protection, a second low-pass filter with a time constant of two minutes filters the ADC output and uses it to scale down the internal dim level of the system (and hence LED current ILED) if the temperature exceeds 95 °C (see Figure 15). The large time constant for this filter ensures that the dim scaling does not happen spontaneously and is not noticeable (suppress spurious glitches). Current ILED starts reducing when resistor RNTC is approximately 6.
PAGE 14
CS1610/11/12/13 6. PACKAGE DRAWING 16 SOICN (150 MIL BODY WITH EXPOSED PAD) mm inch Dimension MIN NOM MAX MIN NOM MAX A -- -- 1.75 -- -- 0.069 A1 0.10 -- 0.25 0.004 -- 0.010 b 0.31 -- 0.51 0.012 -- 0.020 c 0.10 -- 0.25 0.004 -- 0.010 D D1 9.90BSC 4.95 5.10 0.390BSC 5.25 0.195 0.201 E 6.00BSC 0.236BSC E1 3.90BSC 0.154BSC E2 2.35 e 2.50 2.65 0.093 1.27BSC 0.098 0.207 0.104 0.05BSC L 0.40 -- 1.27 0.016 -- 0.
PAGE 15
CS1610/11/12/13 7.
PAGE 16
CS1610/11/12/13 REVISION HISTORY Revision Date Changes PP1 MAR 2011 Added second stage gain section. Preliminary Status. PP2 MAY 2011 Added CS1611 230V device. PP3 OCT 2011 Moved power supply to boost auxiliary winding. PP4 NOV 2011 Added CS1612/13. Edited for content and clarity. F1 DEC 2011 Edited for clarity and typographical error. F2 FEB 2012 Corrected typographical errors. F3 MAR 2012 Edited for content and clarity.